CBG-4880: Use versionPruningWindowHrs for HLV Compaction instead of metadata purge interval

[bbrks]

CBG-4880

Use versionPruningWindowHrs for HLV Compaction instead of metadata purge interval. Falls back to 30d default - same as if MPI was not available.

Integration Tests

• GSI=true,xattrs=true https://jenkins.sgwdev.com/job/SyncGatewayIntegration/98/
  • unrelated flake

[Copilot]

Pull Request Overview

This PR changes the HLV (Hybrid Logical Vector) compaction mechanism to use the XDCR version pruning window (versionPruningWindowHrs) instead of the metadata purge interval for determining when to compact version history.

• Introduces a new GetVersionPruningWindow function that fetches the XDCR version pruning window from the bucket configuration
• Updates HLV compaction to use version pruning window instead of metadata purge interval
• Adds test support for overriding the version pruning window in tests

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
db/database.go	Adds GetVersionPruningWindow function and related caching infrastructure
db/crud.go	Updates HLV compaction to use version pruning window instead of metadata purge interval
base/bucket.go	Adds VersionPruningWindow method to CouchbaseBucketStore interface
base/collection.go	Implements VersionPruningWindow method for GocbV2Bucket
base/bucket_gocb_test.go	Adds test coverage for the new version pruning window functionality
rest/replicatortest/replicator_conflict_test.go	Updates test to use version pruning window override instead of purge interval override