Abhishek01911

Fix: Handle kafka topic not found exception in fetchPartitionCount fu…

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Summary Resolves Issue [17045](https://github.com/apache/pinot/issues/17045) This PR fixes an issue where an exception in fetchPartitionCount, often caused by a deleted topic, would halt ingestion for an entire multi-topic table. By catching...

Justification -- The ensureAllPartitionsConsuming function validates and repairs LLC (Low-Level Consumer) realtime segments to ensure all stream partitions have active consuming segments. It's called by the RealtimeSegmentValidationManager periodic task to...