Fix Windows CI: close SQLite before TempDir cleanup

Add t.Cleanup(router.CloseAll) to snippet and watcher test helpers.
Windows does not allow deleting files held by another process, so the
SQLite DB must be closed before t.TempDir() removal runs.

Author: DeusData

internal/tools/snippet_test.go

@@ -47,6 +47,7 @@ func Run() {
 	if err != nil {
 		t.Fatal(err)
 	}
+	t.Cleanup(router.CloseAll)
 
 	projName := "test-project"
 	st, err := router.ForProject(projName)

internal/watcher/watcher_test.go

@@ -19,6 +19,7 @@ func newTestRouter(t *testing.T, projectName, rootPath string) *store.StoreRoute
 	if err != nil {
 		t.Fatal(err)
 	}
+	t.Cleanup(r.CloseAll)
 	if projectName != "" {
 		st, err := r.ForProject(projectName)
 		if err != nil {