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

backend-rust/migrations/001_initial_schema.up.sql

@@ -0,0 +1,38 @@
+-- Initial database schema for Owly News Summariser
+
+-- News table to store articles
+CREATE TABLE IF NOT EXISTS news
+(
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    title      TEXT      NOT NULL,
+    summary    TEXT,
+    url        TEXT      NOT NULL,
+    published  TIMESTAMP NOT NULL,
+    country    TEXT      NOT NULL,
+    created_at INTEGER DEFAULT (strftime('%s', 'now'))
+);
+
+-- Index for faster queries on published date
+CREATE INDEX IF NOT EXISTS idx_news_published ON news (published);
+
+-- Feeds table to store RSS feed sources
+CREATE TABLE IF NOT EXISTS feeds
+(
+    id      INTEGER PRIMARY KEY,
+    country TEXT,
+    url     TEXT UNIQUE NOT NULL
+);
+
+-- Settings table for application configuration
+CREATE TABLE IF NOT EXISTS settings
+(
+    key TEXT PRIMARY KEY,
+    val TEXT NOT NULL
+);
+
+-- Meta table for application metadata
+CREATE TABLE IF NOT EXISTS meta
+(
+    key TEXT PRIMARY KEY,
+    val TEXT NOT NULL
+);