Un/poorly handled async promise

Promises/futures aren't awaited or errors are dropped, causing hidden failures or inconsistent state.

Always await/return promises; add centralized rejection handlers; propagate errors; cover with async tests

Observable signs that may indicate Un/poorly handled async promise:

• Unhandled promise rejections in logs/console.
• Hidden failures where downstream steps silently skip.
• UI freezes or inconsistent state after async errors.