feat(autorenewal): implement automatic subscription renewal system

bot/scheduler.py

@@ -0,0 +1,29 @@
+import asyncio
+import logging
+
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker
+
+from services.renewal_service import RenewalService
+
+logger = logging.getLogger(__name__)
+
+
+async def run_autorenewal(renewal_service: RenewalService, session_factory: async_sessionmaker):
+    async with session_factory() as session:
+        try:
+            results = await renewal_service.process_autorenewals(session)
+            logger.info("Autorenewal job completed: %s", results)
+        except Exception:
+            logger.exception("Autorenewal job failed")
+            await session.rollback()
+
+
+async def start_scheduler(
+    renewal_service: RenewalService,
+    session_factory: async_sessionmaker,
+    interval_hours: int = 24,
+):
+    logger.info("Starting autorenewal scheduler with interval %dh", interval_hours)
+    while True:
+        await run_autorenewal(renewal_service, session_factory)
+        await asyncio.sleep(interval_hours * 3600)