Move history archive max timestamp query into repository

backend/app/repositories/history_archive_repo.py

@@ -36,6 +36,15 @@ async def archive_ban_event(
     return inserted
 
 
+async def get_max_timeofban(db: aiosqlite.Connection) -> int | None:
+    """Return the latest archived ban timestamp or ``None`` when empty."""
+    async with db.execute("SELECT MAX(timeofban) FROM history_archive") as cursor:
+        row = await cursor.fetchone()
+    if row is None or row[0] is None:
+        return None
+    return int(row[0])
+
+
 async def get_archived_history(
     db: aiosqlite.Connection,
     since: int | None = None,

backend/app/services/history_service.py

@@ -28,7 +28,7 @@ from app.models.history import (
     IpTimelineEvent,
 )
 from app.repositories import fail2ban_db_repo
-from app.repositories.history_archive_repo import archive_ban_event
+from app.repositories.history_archive_repo import archive_ban_event, get_max_timeofban
 from app.services.fail2ban_metadata_service import default_fail2ban_metadata_service
 from app.utils.fail2ban_db_utils import parse_data_json, ts_to_iso
 
@@ -67,11 +67,7 @@ _HISTORY_SYNC_BACKFILL_WINDOW: int = 648000
 
 async def _get_last_archive_ts(db: aiosqlite.Connection) -> int | None:
     """Return the most recent archived ban timestamp, or ``None`` if empty."""
-    async with db.execute("SELECT MAX(timeofban) FROM history_archive") as cur:
-        row = await cur.fetchone()
-    if row is None or row[0] is None:
-        return None
-    return int(row[0])
+    return await get_max_timeofban(db)
 
 
 async def sync_from_fail2ban_db(