Refactor geo re-resolve to use geo_cache repo and move data-access out of router

backend/app/repositories/geo_cache_repo.py

@@ -0,0 +1,33 @@
+"""Repository for the geo cache persistent store.
+
+This module provides typed, async helpers for querying and mutating the
+``geo_cache`` table in the BanGUI application database.
+
+All functions accept an open :class:`aiosqlite.Connection` and do not manage
+connection lifetimes.
+"""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    import aiosqlite
+
+
+async def get_unresolved_ips(db: aiosqlite.Connection) -> list[str]:
+    """Return all IPs in ``geo_cache`` where ``country_code`` is NULL.
+
+    Args:
+        db: Open BanGUI application database connection.
+
+    Returns:
+        List of IPv4/IPv6 strings that need geo resolution.
+    """
+    ips: list[str] = []
+    async with db.execute(
+        "SELECT ip FROM geo_cache WHERE country_code IS NULL"
+    ) as cur:
+        async for row in cur:
+            ips.append(str(row[0]))
+    return ips