Restringe pattern ops sidekiq_failure per evitare falsi allarmi.

Non segnala più WARN generici come delete_path failed; solo job ActiveJob/Sidekiq realmente falliti.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/config/ops_log_patterns.yml

@@ -10,7 +10,8 @@ patterns:
     regex: 'PG::(ConnectionBad|UnableToSend)'
   - name: sidekiq_failure
     severity: warning
-    regex: 'WARN.*fail'
+    # Job Sidekiq/ActiveJob falliti — non matchare WARN generici tipo "delete_path failed"
+    regex: '(Error performing .+Job \(Job ID:|Job raised exception)'
   - name: fatal_error
     severity: critical
     regex: '\bFATAL\b'