diff --git a/backend-rust/Cargo.lock b/backend-rust/Cargo.lock
index 68195d5..c7e2948 100644
--- a/backend-rust/Cargo.lock
+++ b/backend-rust/Cargo.lock
@@ -53,6 +53,38 @@ version = "1.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e16d2d3311acee920a9eb8d33b8cbc1787ce4a264e85f964c2404b969bdcd487"
 
+[[package]]
+name = "assert-json-diff"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47e4f2b81832e72834d7518d8487a0396a28cc408186a2e8854c0f98011faf12"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "async-stream"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b5a71a6f37880a80d1d7f19efd781e4b5de42c88f0722cc13bcb6cc2cfe8476"
+dependencies = [
+ "async-stream-impl",
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-stream-impl"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7c24de15d275a1ecfd47a380fb4d5ec9bfe0933f309ed5e705b775596a3574d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "atoi"
 version = "2.0.0"
@@ -62,6 +94,12 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "auto-future"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c1e7e457ea78e524f48639f551fd79703ac3f2237f5ecccdf4708f8a75ad373"
+
 [[package]]
 name = "autocfg"
 version = "1.5.0"
@@ -122,6 +160,36 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "axum-test"
+version = "17.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eb1dfb84bd48bad8e4aa1acb82ed24c2bb5e855b659959b4e03b4dca118fcac"
+dependencies = [
+ "anyhow",
+ "assert-json-diff",
+ "auto-future",
+ "axum",
+ "bytes",
+ "bytesize",
+ "cookie",
+ "http",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
+ "mime",
+ "pretty_assertions",
+ "reserve-port",
+ "rust-multipart-rfc7578_2",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "smallvec",
+ "tokio",
+ "tower",
+ "url",
+]
+
 [[package]]
 name = "backtrace"
 version = "0.3.75"
@@ -185,6 +253,12 @@ version = "1.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d71b6127be86fdcfddb610f7182ac57211d4b18a3e9c82eb2d17662f2227ad6a"
 
+[[package]]
+name = "bytesize"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3c8f83209414aacf0eeae3cf730b18d6981697fba62f200fcfb92b9f082acba"
+
 [[package]]
 name = "cc"
 version = "1.2.31"
@@ -227,6 +301,16 @@ version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
 
+[[package]]
+name = "cookie"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ddef33a339a91ea89fb53151bd0a4689cfce27055c291dfa69945475d22c747"
+dependencies = [
+ "time",
+ "version_check",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.9.4"
@@ -303,6 +387,21 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "deranged"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c9e6a11ca8224451684bc0d7d5a7adbf8f2fd6887261a1cfc3c0432f9d4068e"
+dependencies = [
+ "powerfmt",
+]
+
+[[package]]
+name = "diff"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -671,6 +770,7 @@ dependencies = [
  "pin-project-lite",
  "smallvec",
  "tokio",
+ "want",
 ]
 
 [[package]]
@@ -680,13 +780,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8d9b05277c7e8da2c93a568989bb6207bef0112e8d17df7a6eda4a3cf143bc5e"
 dependencies = [
  "bytes",
+ "futures-channel",
  "futures-core",
+ "futures-util",
  "http",
  "http-body",
  "hyper",
+ "libc",
  "pin-project-lite",
+ "socket2",
  "tokio",
  "tower-service",
+ "tracing",
 ]
 
 [[package]]
@@ -1013,11 +1118,17 @@ dependencies = [
  "num-integer",
  "num-iter",
  "num-traits",
- "rand",
+ "rand 0.8.5",
  "smallvec",
  "zeroize",
 ]
 
+[[package]]
+name = "num-conv"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
+
 [[package]]
 name = "num-integer"
 version = "0.1.46"
@@ -1119,11 +1230,13 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "axum",
+ "axum-test",
  "dotenv",
  "serde",
  "serde_json",
  "sqlx",
  "tokio",
+ "tokio-test",
  "toml",
  "tracing",
  "tracing-subscriber",
@@ -1221,6 +1334,12 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "powerfmt"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.21"
@@ -1230,6 +1349,16 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "pretty_assertions"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ae130e2f271fbc2ac3a40fb1d07180839cdbbe443c7a27e1e3c13c5cac0116d"
+dependencies = [
+ "diff",
+ "yansi",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.95"
@@ -1261,8 +1390,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
  "libc",
- "rand_chacha",
- "rand_core",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6db2770f06117d490610c7488547d543617b21bfa07796d7a12f6f1bd53850d1"
+dependencies = [
+ "rand_chacha 0.9.0",
+ "rand_core 0.9.3",
 ]
 
 [[package]]
@@ -1272,7 +1411,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.3",
 ]
 
 [[package]]
@@ -1284,6 +1433,15 @@ dependencies = [
  "getrandom 0.2.16",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99d9a13982dcf210057a8a78572b2217b667c3beacbf3a0d8b454f6f82837d38"
+dependencies = [
+ "getrandom 0.3.3",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.5.17"
@@ -1337,6 +1495,15 @@ version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
 
+[[package]]
+name = "reserve-port"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "21918d6644020c6f6ef1993242989bf6d4952d2e025617744f184c02df51c356"
+dependencies = [
+ "thiserror",
+]
+
 [[package]]
 name = "rsa"
 version = "0.9.8"
@@ -1350,13 +1517,28 @@ dependencies = [
  "num-traits",
  "pkcs1",
  "pkcs8",
- "rand_core",
+ "rand_core 0.6.4",
  "signature",
  "spki",
  "subtle",
  "zeroize",
 ]
 
+[[package]]
+name = "rust-multipart-rfc7578_2"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c839d037155ebc06a571e305af66ff9fd9063a6e662447051737e1ac75beea41"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-util",
+ "http",
+ "mime",
+ "rand 0.9.2",
+ "thiserror",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.26"
@@ -1542,7 +1724,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77549399552de45a898a580c1b41d445bf730df867cc44e6c0233bbc4b8329de"
 dependencies = [
  "digest",
- "rand_core",
+ "rand_core 0.6.4",
 ]
 
 [[package]]
@@ -1706,7 +1888,7 @@ dependencies = [
  "memchr",
  "once_cell",
  "percent-encoding",
- "rand",
+ "rand 0.8.5",
  "rsa",
  "serde",
  "sha1",
@@ -1745,7 +1927,7 @@ dependencies = [
  "md-5",
  "memchr",
  "once_cell",
- "rand",
+ "rand 0.8.5",
  "serde",
  "serde_json",
  "sha2",
@@ -1875,6 +2057,37 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "time"
+version = "0.3.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a7619e19bc266e0f9c5e6686659d394bc57973859340060a69221e57dbc0c40"
+dependencies = [
+ "deranged",
+ "itoa",
+ "num-conv",
+ "powerfmt",
+ "serde",
+ "time-core",
+ "time-macros",
+]
+
+[[package]]
+name = "time-core"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9e9a38711f559d9e3ce1cdb06dd7c5b8ea546bc90052da6d06bb76da74bb07c"
+
+[[package]]
+name = "time-macros"
+version = "0.2.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3526739392ec93fd8b359c8e98514cb3e8e021beb4e5f597b00a0221f8ed8a49"
+dependencies = [
+ "num-conv",
+ "time-core",
+]
+
 [[package]]
 name = "tinystr"
 version = "0.8.1"
@@ -1942,6 +2155,19 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-test"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2468baabc3311435b55dd935f702f42cd1b8abb7e754fb7dfb16bd36aa88f9f7"
+dependencies = [
+ "async-stream",
+ "bytes",
+ "futures-core",
+ "tokio",
+ "tokio-stream",
+]
+
 [[package]]
 name = "toml"
 version = "0.9.5"
@@ -2071,6 +2297,12 @@ dependencies = [
  "tracing-log",
 ]
 
+[[package]]
+name = "try-lock"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
+
 [[package]]
 name = "typenum"
 version = "1.18.0"
@@ -2139,6 +2371,15 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
+[[package]]
+name = "want"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa7760aed19e106de2c7c0b581b509f2f25d3dacaf737cb82ac61bc6d760b0e"
+dependencies = [
+ "try-lock",
+]
+
 [[package]]
 name = "wasi"
 version = "0.11.1+wasi-snapshot-preview1"
@@ -2469,6 +2710,12 @@ version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ea2f10b9bb0928dfb1b42b65e1f9e36f7f54dbdf08457afefb38afcdec4fa2bb"
 
+[[package]]
+name = "yansi"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfe53a6657fd280eaa890a3bc59152892ffa3e30101319d168b781ed6529b049"
+
 [[package]]
 name = "yoke"
 version = "0.8.0"
diff --git a/backend-rust/Cargo.toml b/backend-rust/Cargo.toml
index 6e12ea1..d86cdf3 100644
--- a/backend-rust/Cargo.toml
+++ b/backend-rust/Cargo.toml
@@ -14,3 +14,7 @@ dotenv = "0.15"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 toml = "0.9.5"
+
+[dev-dependencies]
+tokio-test = "0.4"
+axum-test = "17.3"