removed custom migration logic, integrated sqlx native migrations, and reorganized migration files for clarity and maintainability

backend-rust/example.env

@@ -0,0 +1,31 @@
+# URL for the Ollama service
+OLLAMA_HOST=http://localhost:11434
+
+# Interval for scheduled news fetching in hours
+CRON_HOURS=1
+
+# Minimum interval for scheduled news fetching in hours
+MIN_CRON_HOURS=0.5
+
+# Cooldown period in minutes between manual syncs
+SYNC_COOLDOWN_MINUTES=30
+
+# LLM model to use for summarization
+LLM_MODEL=qwen2:7b-instruct-q4_K_M
+LLM_MODEL=phi3:3.8b-mini-128k-instruct-q4_0
+LLM_MODEL=mistral-nemo:12b
+
+# Timeout in seconds for LLM requests
+LLM_TIMEOUT_SECONDS=180
+
+# Timeout in seconds for Ollama API requests
+OLLAMA_API_TIMEOUT_SECONDS=10
+
+# Timeout in seconds for article fetching
+ARTICLE_FETCH_TIMEOUT=30
+
+# Maximum length of article content to process
+MAX_ARTICLE_LENGTH=5000
+
+# SQLite database connection string
+DB_NAME=owlynews.sqlite3