Fix event debouncing: merge ops instead of overwriting

- touch fires CREATE then CHMOD, the CHMOD was overwriting CREATE
  in the debounce map, and CHMOD is not handled, so file was never synced
- Now debounce merges event ops (CREATE|CHMOD → treated as CREATE)
- Added sync/remove debug logging
- Tested in Docker: create, modify, delete all working

1 files changed, 13 insertions, 6 deletions

diff --git a/watcher.go b/watcher.go
index 8c8177e..68a1a1b 100644
--- a/watcher.go
+++ b/watcher.go
@@ -18,7 +18,8 @@ func watch(ctx context.Context, hostDir, dataDir string, manifest *Manifest, sta
 	defer watcher.Close()
 
 	var mu sync.Mutex
-	debounce := make(map[string]*time.Timer)
+	debounceTimers := make(map[string]*time.Timer)
+	debounceOps := make(map[string]fsnotify.Op)
 
 	if err := addWatchersRecursively(watcher, hostDir, stack); err != nil {
 		return err
@@ -50,14 +51,20 @@ func watch(ctx context.Context, hostDir, dataDir string, manifest *Manifest, sta
 			logDebug("event: %s %s", event.Op, relPath)
 
 			mu.Lock()
-			if t, exists := debounce[relPath]; exists {
-				t.Stop()
+			if existing, exists := debounceOps[relPath]; exists {
+				debounceTimers[relPath].Stop()
+				debounceOps[relPath] = existing | event.Op
+			} else {
+				debounceOps[relPath] = event.Op
 			}
-			debounce[relPath] = time.AfterFunc(200*time.Millisecond, func() {
+			path := relPath
+			debounceTimers[relPath] = time.AfterFunc(200*time.Millisecond, func() {
 				mu.Lock()
-				delete(debounce, relPath)
+				op := debounceOps[path]
+				delete(debounceOps, path)
+				delete(debounceTimers, path)
 				mu.Unlock()
-				handleEvent(event.Op, hostDir, dataDir, relPath, manifest, stack, dryRun, watcher)
+				handleEvent(op, hostDir, dataDir, path, manifest, stack, dryRun, watcher)
 			})
 			mu.Unlock()