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seaweedfs/weed/storage
pingqiuandClaude Opus 4.6 785a7d7efd feat: wire real pinner into flusher retention + real WAL scan executor (Phase 07 P1)
Pinner wired to real retention:
- NewPinner calls vol.SetV2RetentionFloor(p.MinWALRetentionFloor)
- Flusher.RetentionFloorFn() / SetRetentionFloorFn() exposed
- SetV2RetentionFloor chains with existing shipper retention floor
- Holds actually prevent WAL reclaim (not just tracked state)

Executor uses real WAL scan:
- BlockVol.ScanWALEntries(fromLSN, callback) wraps wal.ScanFrom
  with real fd, walOffset, checkpointLSN
- Executor.StreamWALEntries uses ScanWALEntries (not stub)
- Reads real WAL entries, tracks highest LSN scanned

CommittedLSN mapping:
- Explicitly documented as interim V1 model (committed = checkpointed)
- Will diverge when V2 distributed commit separates from local flush

Carry-forward:
- TransferSnapshot/TransferFullBase/TruncateWAL: stubs (need extent I/O)
- Control intent from confirmed failover: deferred

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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