Refactor geo re-resolve endpoint into geo_service and add typed response

backend/app/services/geo_service.py

@@ -187,6 +187,41 @@ async def get_unresolved_ips(db: aiosqlite.Connection) -> list[str]:
     return await geo_cache_repo.get_unresolved_ips(db)
 
 
+async def re_resolve_all(
+    db: aiosqlite.Connection,
+    http_session: aiohttp.ClientSession,
+) -> dict[str, int]:
+    """Retry geo resolution for all unresolved cache entries.
+
+    This helper clears the in-memory negative cache before attempting a
+    fresh batch lookup, then returns counters for how many IPs were retried
+    and how many gained a resolved country code.
+
+    Args:
+        db: BanGUI application database connection.
+        http_session: Shared aiohttp client session.
+
+    Returns:
+        A dict with ``resolved`` and ``total`` counts.
+    """
+    unresolved = await get_unresolved_ips(db)
+    if not unresolved:
+        return {"resolved": 0, "total": 0}
+
+    clear_neg_cache()
+    geo_map = await lookup_batch(unresolved, http_session, db=db)
+    resolved_count = sum(
+        1 for info in geo_map.values() if info.country_code is not None
+    )
+
+    log.info(
+        "geo_re_resolve_complete",
+        total=len(unresolved),
+        resolved=resolved_count,
+    )
+    return {"resolved": resolved_count, "total": len(unresolved)}
+
+
 def init_geoip(mmdb_path: str | None) -> None:
     """Initialise the MaxMind GeoLite2-Country database reader.