cambios

backend/alembic/env.py

@@ -1,6 +1,11 @@
 import asyncio
+import sys
 from logging.config import fileConfig
 
+# Windows + asyncpg requiere SelectorEventLoop (no ProactorEventLoop)
+if sys.platform == "win32":
+    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
+
 from alembic import context
 from sqlalchemy.ext.asyncio import create_async_engine