Removes race condition cluster get pid issue 1131 #1140
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I read the contributing.md and followed the steps
Added tests for manager in disthash
TestManagerConcurrentAccess simulates the race condition by spawning two goroutines - one updates topology continuously while another performs identity lookups, verifying no data races occur under concurrent read/write operations to the rdv field.
TestConcurrentClusterOperations creates a 3-node cluster and performs 100 concurrent identity lookups across different nodes
The tests reveal there is a lot of different data races but no longer in onClusterTopology and get.