v0.5.29 release (latest)

v0.5.29 release notes for the GitHub Release v0.5.29 (release task: Issue #1173).

Tag state (verified against origin)

Ref	Object	Points at
`v0.5.29`	annotated tag `e02ec5a7e750d7d4bf8ec468f80ecdc4cb037313`	commit `e398edbcc67a32f15ed2f74e0dce6dd625ca8fcb`

Branch protection that makes every merge fail is only discovered after delivery: add a merge-gate preflight to orbi doctor (Issue #1174; PR #1177)

Blocked comments render an 11-line diagnosis inline: fold long field values by length, not per-scene allowlist (Issue #1170; PR #1172)
Blocked comments bury the one actionable sentence: split terminal failure into action / reason / diagnosis (Issue #1171; PR #1175)