fix(release): avoid duplicate sponsor blurbs

[jdx]

Summary

• Make the release sponsor-blurb append step idempotent
• Leave communique-generated sponsor text unchanged when it is already present

Testing

• actionlint .github/workflows/release-plz.yml
• git diff --check

This PR was generated by Codex.

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Note

Low Risk
Low risk workflow-only change that makes release-note editing idempotent by detecting an existing sponsor section before appending.

Overview
Makes the enhance-release workflow’s “Append en.dev sponsor blurb” step idempotent by fetching the current GitHub release body once, checking for the existing ## 💚 Sponsor aube header, and skipping the edit when it’s already present.

When absent, it reuses the fetched body and appends the sponsor section as before, preventing duplicate blurbs across reruns.

^{Reviewed by Cursor Bugbot for commit ae3bf33. Bugbot is set up for automated code reviews on this repo. Configure here.}

[greptile-apps]

Greptile Summary

This PR makes the sponsor-blurb append step idempotent by caching the release body in $body, checking for an existing ## 💚 Sponsor aube heading with grep -Fqx, and exiting early if found. It also eliminates a redundant second gh release view call by reusing the cached value via printf '%s ' "$body".

Confidence Score: 5/5

Safe to merge — minimal, correct change to a single workflow step with no logic regressions.

The idempotency guard is logically correct: YAML indentation stripping ensures the heredoc emits ## 💚 Sponsor aube as an exact line, matching the -Fqx pattern. No security concerns, no regressions, one less API call.

No files require special attention.

Important Files Changed

Filename	Overview
.github/workflows/release-plz.yml	Adds an idempotency guard to the 'Append en.dev sponsor blurb' step: fetches the release body once, exits early if the heading is already present, and reuses the cached body string instead of a second gh call.

_{Reviews (1): Last reviewed commit: "fix(release): avoid duplicate sponsor bl..." | Re-trigger Greptile}

[github-actions]

Benchmark changes

Versions:

• aube: 1.6.2 -> 1.7.0
• pnpm: 11.0.3 -> 11.0.4

Public ratios: warm installs vs Bun 7x -> 4x; warm installs vs pnpm 11x -> 9x.

Benchmark	aube	bun	pnpm
Fresh install (warm cache)	332ms -> 415ms (+25%)	2242ms -> 1614ms (-28%)	3500ms -> 3772ms (+8%)
CI install (warm cache, GVS disabled)	930ms -> 1467ms (+58%)	1447ms -> 1641ms (+13%)	2475ms -> 3722ms (+50%)
CI install (cold cache, GVS disabled)	4364ms -> 5519ms (+26%)	4083ms -> 5394ms (+32%)	5380ms -> 6438ms (+20%)

ae3bf33 vs b3ec965 | aube/bun/pnpm | 3 scenarios | 3 runs | 500mbit/50ms | generated by Codex.