fix: run each migration in its own transaction to survive statement timeouts

src/utils/migrate.py

@@ -161,21 +161,22 @@ _MUSIC_SEED = [
 async def run_migrations():
     from src.utils.database import engine
     from sqlalchemy import text
-    try:
-        async with engine.begin() as conn:
-            for stmt in _VECTOR_MIGRATIONS:
+
+    for stmt in _VECTOR_MIGRATIONS:
+        try:
+            async with engine.begin() as conn:
                 await conn.execute(text(stmt))
-        logger.info("[Migrate] Vector extension and columns applied")
-    except Exception as e:
-        logger.warning(f"[Migrate] Vector migrations skipped (pgvector may not be available): {e}")
+        except Exception as e:
+            logger.warning(f"[Migrate] Vector stmt skipped: {e!s:.120}")
+    logger.info("[Migrate] Vector extension and columns applied")
 
-    try:
-        async with engine.begin() as conn:
-            for stmt in _MIGRATIONS:
+    for stmt in _MIGRATIONS:
+        try:
+            async with engine.begin() as conn:
                 await conn.execute(text(stmt))
-        logger.info("[Migrate] Column migrations applied")
-    except Exception as e:
-        logger.warning(f"[Migrate] Column migrations skipped (non-fatal): {e}")
+        except Exception as e:
+            logger.warning(f"[Migrate] Stmt skipped (non-fatal): {e!s:.120}")
+    logger.info("[Migrate] Column migrations applied")
 
     # ivfflat indexes require at least 1 row — best-effort
     try: