Release MCP 3.0.0rc5: restore task fidelity and orchestration reliability

[Foxfire1st]

Summary

Release candidate 5 completes the hotfix2 tail and the task-reader recovery series.

• restore complete task details without resending unchanged bodies on every projection
• repair leaf and master committed/working changesets
• add collapsible sprint and master groups in Operations tasks
• gate hosted dispatch on exact-session readiness and verified delivery
• reclaim inbox items only for positively confirmed-gone sessions
• decouple expensive landing probes from the hot projector loop
• align Operations task and chat activity signaling

Release

• version: 3.0.0rc5
• intended tag after merge: mcp-v3.0.0rc5
• closes Restore complete task reader hydration before rc5 #102

Validation

• dashboard: 46 files, 483 tests passed
• dashboard lint and TypeScript typecheck passed
• production dashboard build and shipped-package parity passed
• Python strict wrapper passed: Ruff, Pyright, Radon, 2094 tests with 4 expected skips, coverage, and enforced CRAP threshold
• configured pre-push hook repeated generated-copy parity and the strict Python wrapper successfully

Landing

Merge commit required; do not squash the independently reviewed leaf history.

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.
To continue using code reviews, add credits to your account and enable them for code reviews in your settings.