feat: add dependency providers

src/proxy_pool/common/dependencies.py

@@ -0,0 +1,21 @@
+from collections.abc import AsyncGenerator
+
+from fastapi import Request
+from redis.asyncio import Redis
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from proxy_pool.plugins.registry import PluginRegistry
+
+
+async def get_db(request: Request) -> AsyncGenerator[AsyncSession, None]:
+    session_factory = request.app.state.session_factory
+    async with session_factory() as session:
+        yield session
+
+
+def get_redis(request: Request) -> Redis:
+    return request.app.state.redis
+
+
+def get_registry(request: Request) -> PluginRegistry:
+    return request.app.state.registry