feat: python worker (bot, scraper, notifier, scheduler)

worker/src/db.py

@@ -0,0 +1,31 @@
+import os
+import logging
+import asyncpg
+
+logger = logging.getLogger(__name__)
+
+_pool: asyncpg.Pool | None = None
+
+
+async def get_pool() -> asyncpg.Pool:
+    global _pool
+    if _pool is None:
+        _pool = await asyncpg.create_pool(
+            host=os.getenv("POSTGRES_HOST", "db"),
+            port=int(os.getenv("POSTGRES_PORT", "5432")),
+            user=os.getenv("POSTGRES_USER", "postgres"),
+            password=os.getenv("POSTGRES_PASSWORD"),
+            database=os.getenv("POSTGRES_DB", "postgres"),
+            min_size=2,
+            max_size=10,
+        )
+        logger.info("Database pool initialized")
+    return _pool
+
+
+async def close_pool() -> None:
+    global _pool
+    if _pool is not None:
+        await _pool.close()
+        logger.info("Database pool closed")
+        _pool = None