fix(api): bound ansible backfill query cost

apps/api/src/jobs/awooop_ansible_candidate_backfill_job.py

@@ -43,6 +43,7 @@ async def _fetch_missing_candidate_incidents(
     scan_limit: int,
 ) -> list[dict[str, Any]]:
     async with get_db_context(project_id) as db:
+        await db.execute(text("SET LOCAL statement_timeout = '5000ms'"))
         result = await db.execute(
             text("""
                 SELECT
@@ -69,6 +70,7 @@ async def _fetch_missing_candidate_incidents(
                       SELECT 1
                       FROM automation_operation_log existing
                       WHERE existing.operation_type = 'ansible_candidate_matched'
+                        AND existing.created_at >= NOW() - (:window_hours * INTERVAL '1 hour')
                         AND existing.input ->> 'executor' = 'ansible'
                         AND coalesce(existing.incident_id::text, existing.input ->> 'incident_id') = incidents.incident_id::text
                   )