Summary

• wait for in-flight CDP reconnects before direct storage/cookie helper commands run
• fail fast with a clear ConnectionError when CDP is still unavailable
• add focused regression tests for reconnect success, timeout, and export_storage_state behavior

Testing

• python -m pytest tests/ci/browser/test_session_start.py -k "cdp_command or export_storage_state_waits_for_reconnect"

Summary by cubic

Guarded direct CDP cookie/storage helpers to wait for in‑flight reconnects and fail fast when CDP is unavailable. This prevents race conditions during reconnect and surfaces clear errors.

• Bug Fixes
  • Added _ensure_cdp_ready_for_command and applied it to export_storage_state, _cdp_get_cookies, _cdp_set_cookies, and _cdp_clear_cookies with timeout and clear ConnectionError messages.
  • Added focused tests for reconnect success, timeout, fast‑fail when disconnected, and export_storage_state waiting before fetching cookies.

^{Written for commit 4fa600a. Summary will update on new commits.}