add migration tracking to entrypoint

entrypoint.sh

@@ -1,12 +1,29 @@
 #!/bin/bash
 set -e
 
-# Initialize database if it doesn't exist
-if [ ! -f "$DATABASE_FILE" ]; then
-    sqlite3 "$DATABASE_FILE" < migrations/001_init.sql
-    sqlite3 "$DATABASE_FILE" < migrations/002_add_anime_titles.sql
-    sqlite3 "$DATABASE_FILE" < migrations/003_add_anime_airing.sql
-fi
+# Create migrations tracking table if it doesn't exist
+sqlite3 "$DATABASE_FILE" "CREATE TABLE IF NOT EXISTS schema_migrations (
+  version TEXT PRIMARY KEY,
+  applied_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);"
+
+# Function to run migration
+run_migration() {
+  local version=$1
+  local file=$2
+  
+  # Check if migration has been run
+  if ! sqlite3 "$DATABASE_FILE" "SELECT 1 FROM schema_migrations WHERE version = '$version';" | grep -q 1; then
+    echo "Running migration: $version"
+    sqlite3 "$DATABASE_FILE" < "$file"
+    sqlite3 "$DATABASE_FILE" "INSERT INTO schema_migrations (version) VALUES ('$version');"
+  fi
+}
+
+# Run migrations
+run_migration "001_init" "migrations/001_init.sql"
+run_migration "002_add_anime_titles" "migrations/002_add_anime_titles.sql"
+run_migration "003_add_anime_airing" "migrations/003_add_anime_airing.sql"
 
 # Start the app
 exec "$@"