v1.5.0-beta.5

Rolling beta with 1 commit on top of v1.5.0-beta.4: P1 stability fixes (#1693 fixing #1686).

Fixed

• Restart-notify panic recovery — daemon no longer crashes if platform panics during post-restart notification
• Cross-type image batch flush — prevents image loss when text arrives during image_batch_window_ms
• Idle close race fixes — background turns re-arm idle timer; schedule before drain

See changelogs/v1.5.0-beta.5.md for details.

Full Changelog: v1.5.0-beta.4...v1.5.0-beta.5