v0.5.51 发布

v0.5.51 的 GitHub Release 发布说明：v0.5.51（release task：Issue #1430）。

Tag 状态（对 origin 验证）

Ref	对象	指向
`v0.5.51`	注解 tag `47a0515661381c8eee59e6ef67a2178b013991c9`	提交 `59e4b39e922b3ff9bb8588831edbb98a497054c2`

Add .cursor-plugin/marketplace.json so Cursor finds the plugin in integrations/claude-plugin (Issue #1437; PR #1438)

README: link the 95-second film and show the run it follows (#1367 → #1370 → v0.5.47) (Issue #1424; PR #1427)
README: point the film poster at the re-cut video (zvPnE2whb08) (Issue #1439; PR #1441)

orbi doctor reports “requires repository administration permission” when the owner’s own token hits the plan-limited rulesets API on a private repository (Issue #1361; PR #1419; PR #1435)
ai-awaiting-merge reposts the same ‘waiting for a maintainer action’ comment on every tick (Issue #1422; PR #1423)
pr-issue-link: recognise all of GitHub’s closing keywords, and stop telling contributors with an existing Issue to open one (Issue #1428; PR #1429)
Merged PR comment: keep review result and target branch visible, fold everything else into Run details (Issue #1431; PR #1432)
Cursor marketplace manifest: add a top-level logo so cursor.directory shows the plugin icon (Issue #1440; PR #1442)