Implements project identity tracking and recovery across the Fusion system (FN-5411), enabling persistent identity for projects across storage migrations, daemon reattaches, and CLI session management. Adds a project identity metadata API and central reattach ensure mechanism, wires identity stampin
Fusion-Task-Id: FN-5411
Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>
Fusion-Task-Id: FN-5411
