Fix cross-host task identity and prepare v0.7.0.1

[dazer1234]

What changed

• de-duplicate temporary and stable Codex task identities across Windows and macOS
• retain learned aliases across selection changes and relay reconnects
• preserve titles and context rings when one host publishes incomplete metadata
• reserve Not assigned for empty slots
• prepare Stream Deck hotfix version 0.7.0.1 and portable release artifacts

Root cause

A newly created task can temporarily have different renderer and rollout IDs on the two Codex hosts. Titleless mirror metadata prevented the existing title-based fallback from identifying both entries as the same task.

Validation

• TypeScript check
• 130/130 tests on Windows
• 129/130 tests on macOS with the Windows-only watcher test skipped
• Stream Deck validate and pack
• release privacy audit
• macOS executable-mode archive check
• portable SHA256SUMS verification on macOS
• exact packaged-to-installed plugin hash parity on the physical Windows Stream Deck setup
• live merged Mac and Windows snapshots with two working tasks, no duplicates, and no assigned titleless slots

Codex was not restarted.