Add Windows native watcher with Unix socket IPC

Architecture:
- Windows binary: watches files via ReadDirectoryChangesW (fsnotify),
  sends events as newline-delimited JSON over Unix domain socket
- Container: performs initial sync, then listens on socket for events
  from Windows watcher

New files:
- cmd_windows.go: Windows serve command (watcher + socket server)
- cmd_linux.go: Linux socket client + event listener
- types.go: shared FileEvent, FileMeta, Manifest types
- watcher_test_helper.go: inotify-based watcher for integration tests

Changes:
- main.go: simplified to just call run()
- watcher.go: removed fsnotify dependency, extracted Watcher interface
- sync.go: removed duplicate type definitions
- watcher_test.go: uses watchForTests() helper

Usage:
  sourcewatch.exe -dir C:\myproject -socket D:\sourcewatch.sock
  docker run -v D:\sourcewatch.sock:/run/sourcewatch.sock \
             -v C:\myproject:/host:ro -v mydata:/data sourcewatch

1 files changed, 16 insertions, 16 deletions

diff --git a/watcher_test.go b/watcher_test.go
index df16930..56f9697 100644
--- a/watcher_test.go
+++ b/watcher_test.go
@@ -20,7 +20,7 @@ func TestWatcher_Create(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -42,7 +42,7 @@ func TestWatcher_CreateInSubdir(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -66,7 +66,7 @@ func TestWatcher_Write(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -90,7 +90,7 @@ func TestWatcher_Remove(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -114,7 +114,7 @@ func TestWatcher_Rename(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -139,7 +139,7 @@ func TestWatcher_IgnoredFileEvents(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -167,7 +167,7 @@ func TestWatcher_Debouncing(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -199,7 +199,7 @@ func TestWatcher_CreateDirectory(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -229,7 +229,7 @@ func TestWatcher_RemoveDirectory(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -255,7 +255,7 @@ func TestWatcher_VerifyManifestUpdated(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -282,7 +282,7 @@ func TestWatcher_NestedGitignore_CreateIgnored(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -310,7 +310,7 @@ func TestWatcher_NestedGitignore_CreateUnignore(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -332,7 +332,7 @@ func TestWatcher_CreateSymlink(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -382,7 +382,7 @@ func TestWatcher_UpdateSymlinkTarget(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -421,7 +421,7 @@ func TestWatcher_RemoveSymlink(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -447,7 +447,7 @@ func TestWatcher_ModifySymlinkTargetFile(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	go watch(ctx, host, data, manifest, stack, false)
+	go watchForTests(ctx, host, data, manifest, stack, false)
 
 	time.Sleep(100 * time.Millisecond)