fix: resolve CI test failures on Linux and Windows

- Fix TestMigrateCommand: Use correct sqlite3 driver name and file URI format
- Fix TestDaemonAutoImportAfterGitPull: Add Windows-specific delay for filesystem timestamp precision
- Fix TestSyncBranchPull_Success: Add Windows-specific delay for file I/O settling

Amp-Thread-ID: https://ampcode.com/threads/T-5abd1f2f-9607-4111-af9d-19df64362ac7
Co-authored-by: Amp <amp@ampcode.com>

cmd/bd/daemon_sync_branch_test.go

@@ -563,6 +563,11 @@ func TestSyncBranchPull_Success(t *testing.T) {
 		t.Error("JSONL not copied to main repo after pull")
 	}
 
+	// On Windows, file I/O may need time to settle
+	if runtime.GOOS == "windows" {
+		time.Sleep(100 * time.Millisecond)
+	}
+
 	// Verify JSONL content matches
 	clone1Data, err := os.ReadFile(clone1JSONLPath)
 	if err != nil {