fix(listing): confirm current groups and bound recovery lock waits

Distinguish all-drive native absence from read uncertainty and confirm current pool targets before omitting a recovered name. Cover both existing single-pool writer lock domains, release before encoding or output, and preserve cache terminal errors without blocking the HTTP error response on remote publication.

Keep ordinary entries free of recovery I/O and locks. Bound the selective short lock-conflict wait, preserve existing retry intervals and quorum, and make retries cancelable with late-grant cleanup coverage. Restore the original raw listing callback and unchanged scanner/healing/migration callers now that recovery errors originate in the merger.

Add deterministic deletion, pool ordering, cache, lock-routing and cancellation regressions to race CI. Focused cmd/dsync/lsync race suites and verifiers pass; complete current-main integration and bare-binary performance validation are recorded in PR #239.

Refs: https://github.com/pgsty/silo/issues/218
Signed-off-by: Feng Ruohang <rh@vonng.com>

internal/lsync/lrwmutex.go

@@ -115,7 +115,13 @@ func (lm *LRWMutex) lockLoop(ctx context.Context, id, source string, timeout tim
 			if lm.lock(id, source, isWriteLock) {
 				return true
 			}
-			time.Sleep(time.Duration(r.Float64() * float64(lockRetryInterval)))
+			timer := time.NewTimer(time.Duration(r.Float64() * float64(lockRetryInterval)))
+			select {
+			case <-retryCtx.Done():
+				timer.Stop()
+				return false
+			case <-timer.C:
+			}
 		}
 	}
 }