Project Mode 0.1.22 — Isolation fixes and clearer architecture

Maintenance release for native Project coordination in DeepSeek Harness.

• Fix cross-Project error contamination: a recovered background warning no longer permanently blocks other Coordinator turns. Current Project work and canonical result consumption still govern closure.
• Align Coordinator Worker lists, public snapshots and UI membership. Failed creation placeholders remain internal; real Workers with failed execution remain visible.
• Extract native event bindings, Project lifecycle and snapshot assembly from the Host entry. Split dispatch into durable preparation, native admission and lifecycle actions. Public Remote and storage contracts stay unchanged.
• Reorganize both READMEs with capabilities, quick start, usage, project structure and documentation links; clarify data ownership and contributor testing.

Validation:142 Host/Client/integration tests,8 native contracts,Host/Client typechecks, fresh npm/forwarder/Git install consumers and clean-checkout npm ci. Independent review found no actionable issues. A real Desktop model task dispatched a Worker, received its full final AI payload exactly once and closed one Coordinator turn after result consumption.

Developer preview. Requires DSH0.2.1-rc.3 with the repository's three explicit compatibility extensions; no automatic application patching or npm publication. The newly spawned Worker timeline briefly required the existing Retry action when native session observation was not yet ready; this remaining UI read-timing issue is recorded in docs/verification.md. Natural delegation remains model-dependent.