Fix geo_re_resolve async mocks and mark tasks complete

backend/app/tasks/geo_re_resolve.py

@@ -17,7 +17,7 @@ The task runs every 10 minutes.  On each invocation it:
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING
 
 import structlog
 
@@ -35,7 +35,7 @@ GEO_RE_RESOLVE_INTERVAL: int = 600
 JOB_ID: str = "geo_re_resolve"
 
 
-async def _run_re_resolve(app: Any) -> None:
+async def _run_re_resolve(app: "FastAPI") -> None:
     """Query NULL-country IPs from the database and re-resolve them.
 
     Reads shared resources from ``app.state`` and delegates to