Fix geo_re_resolve async mocks and mark tasks complete

backend/app/tasks/health_check.py

@@ -18,7 +18,7 @@ within 60 seconds of that activation, a
 from __future__ import annotations
 
 import datetime
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, TypedDict
 
 import structlog
 
@@ -31,6 +31,14 @@ if TYPE_CHECKING:  # pragma: no cover
 
 log: structlog.stdlib.BoundLogger = structlog.get_logger()
 
+
+class ActivationRecord(TypedDict):
+    """Stored timestamp data for a jail activation event."""
+
+    jail_name: str
+    at: datetime.datetime
+
+
 #: How often the probe fires (seconds).
 HEALTH_CHECK_INTERVAL: int = 30
 
@@ -39,7 +47,7 @@ HEALTH_CHECK_INTERVAL: int = 30
 _ACTIVATION_CRASH_WINDOW: int = 60
 
 
-async def _run_probe(app: Any) -> None:
+async def _run_probe(app: "FastAPI") -> None:
     """Probe fail2ban and cache the result on *app.state*.
 
     Detects online/offline state transitions.  When fail2ban goes offline
@@ -86,7 +94,7 @@ async def _run_probe(app: Any) -> None:
     elif not status.online and prev_status.online:
         log.warning("fail2ban_went_offline")
         # Check whether this crash happened shortly after a jail activation.
-        last_activation: dict[str, Any] | None = getattr(
+        last_activation: ActivationRecord | None = getattr(
             app.state, "last_activation", None
         )
         if last_activation is not None: