SIENTIAPDE-1325

Enhance Ingestor Class with Asynchronous Metrics and Monitoring Integration

- Refactored Ingestor class to inherit from SientiaMonitoring for improved observability.
- Updated methods to utilize asynchronous operations for declaring active ingestors and managing slots.
- Integrated pod_id label into various metrics for better tracking.
- Adjusted unit tests to reflect changes in the Ingestor initialization and asynchronous behavior.

ingestor/metrics.py

@@ -58,14 +58,17 @@ APP_UP = Gauge(
 ACTIVE_INGESTORS = Gauge(
     'ingestor_active_total',
     'Number of active ingestors reported by Redis',
+    POD_ID_LABEL,
 )
 SLOTS_TOTAL = Gauge(
     'ingestor_slots_total',
     'Total number of slots configured in Redis',
+    POD_ID_LABEL,
 )
 LEASES_TOTAL = Gauge(
     'ingestor_leases_total',
     'Total number of leases (allocated slots) in Redis',
+    POD_ID_LABEL,
 )
 SLOTS_MANAGED = Gauge(
     'ingestor_slots_managed_current',