Switch autopush releases to use latest tag

[yiyche]

• a quick script to update stable tag

[codacy-production]

Not up to standards ⛔

🔴 Issues 2 minor

Alerts:
⚠ 2 issues (≤ 0 issues of at least minor severity)

Results:
2 new issues

Category	Results
CodeStyle	2 minor

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🟢 Metrics 0 complexity

Metric	Results
Complexity	0

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[gemini-code-assist]

Code Review

This pull request introduces a promotion mechanism to stable releases. It adds a promote.sh script to promote a specified version to 'stable' in the Artifact Registry, updates the default _PROD_TAG in cloudbuild.yaml to latest, and documents the promotion process in the README. Feedback on the new script includes adopting set -euo pipefail for more robust error handling and double-quoting variables to prevent word splitting.

[gemini-code-assist]

It is a best practice to use set -u (to exit on undefined variables) and set -o pipefail (to prevent errors in pipelines from being masked) along with set -e for more robust error handling in Bash scripts.

Suggested change

	set -e
	set -euo pipefail

[gemini-code-assist]

Variables should be double-quoted to prevent word splitting and globbing, especially when they are user-controlled or environment-provided (like $PROJECT_ID and $VERSION). This ensures the script behaves correctly even if these variables contain spaces or special characters.

Suggested change

	run_cmd gcloud builds submit . \
	--config=update-version.yaml \
	--project=$PROJECT_ID \
	--substitutions=_VERSION=$VERSION,_PROD_TAG=stable
	run_cmd gcloud builds submit . \
	--config=update-version.yaml \
	--project="$PROJECT_ID" \
	--substitutions="_VERSION=$VERSION,_PROD_TAG=stable"