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a042a6e1e8
Add collection-level granularity to the garbage collector pause/resume mechanism. Previously, GC pause affected all collections globally. Now operators can pause GC for specific collections while allowing other collections to continue normal GC operations. Changes: - Add `pausedCollection` concurrent map to track per-collection pause state - Extend `Pause()` and `Resume()` methods with `collectionID` parameter - Add `collectionGCPaused()` helper to check collection pause status - Skip dropped segment recycling when collection GC is paused - Update management API to accept optional `collection_id` query parameter - Add `GetInt64Value()` utility function for parsing int64 from KV pairs - Maintain backward compatibility: collectionID <= 0 triggers global pause This provides DevOps with finer control over Milvus data lifecycle. issue: #45941 --------- Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>