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Summary: This adds a new public API to allow applications to abort all running compactions and prevent new ones from starting. Unlike DisableManualCompaction() which only pauses manual compactions and waits for them to finish naturally, AbortAllCompactions() actively signals running compactions (both automatic and manual) to terminate early and waits for them to complete before returning. The abort signal is checked periodically during compaction (every 100 keys), so ongoing compactions abort quickly. Any output files from aborted compactions are automatically cleaned up to prevent partial results from being installed. This is useful for scenarios where applications need to quickly stop all compaction activity, such as during graceful shutdown or when performing maintenance operations. Pull Request resolved: https://github.com/facebook/rocksdb/pull/14227 Test Plan: - Unit tests in db_compaction_abort_test.cc cover various abort scenarios including: abort before/during compaction, abort with multiple subcompactions, nested abort/resume calls, abort with CompactFiles API, abort across multiple column families, and timing guarantees - Updated compaction_job_test.cc to include the new parameter Reviewed By: anand1976 Differential Revision: D91480994 Pulled By: xingbowang fbshipit-source-id: 36837971d8a540cd34d3ec28a78bc94b582625b0