Validate PR template router effectiveness for reducing review churn and CI reruns #1058

Summary

Validate rollout of the PR template router from PR #1057 and confirm the workflow-minute reduction package is compliant and merge-ready.

Scope

• Verify branch-prefix template routing coverage.
• Validate PR metadata quality and changelog compliance.
• Confirm workflows are passing and minute-savings reporting is operational.

Acceptance criteria

• Branch-prefix routing and template guidance are consistent.
• PR template compliance is validated for PR Feat/reduce gh actions minutes #1057.
• Savings watcher workflow runs and publishes report output.
• Required follow-up fixes for workflow/lint/template checks are completed.

Definition of Ready (DoR)

• Scope and expected outcomes are clear.
• Dependencies and governance constraints are identified.
• Validation approach is defined.

Definition of Done (DoD)

• PR Feat/reduce gh actions minutes #1057 is merged to develop.
• All required workflows on PR Feat/reduce gh actions minutes #1057 pass.
• Savings report issue is updated by a successful manual/scheduled run.
• This issue is closed without status:needs-more-info.

Linked PR

• Feat/reduce gh actions minutes #1057