fix: Improve database connection retry logic with detailed error messages

.gitea/actions/setup-python-env/action.yml

@@ -139,12 +139,17 @@ runs:
             f"port={os.environ['DATABASE_PORT']}"
         )
 
-        for attempt in range(30):
-            try:
-                with psycopg2.connect(dsn):
-                    break
-            except psycopg2.OperationalError:
-                time.sleep(2)
+        max_attempts = 30
+        for attempt in range(max_attempts):
+          try:
+            with psycopg2.connect(dsn):
+              break
+          except psycopg2.OperationalError as exc:
+            print(
+              f"Attempt {attempt + 1}/{max_attempts} failed to connect to Postgres: {exc}",
+              flush=True,
+            )
+            time.sleep(2)
         else:
             raise SystemExit("Postgres service did not become available")
         PY