PROD-045 Add label and triage automation for PRs and issues

[rndrntwrk]

Canonical source: docs/release/github-project-production-backlog.md

Epic: Repository Governance, Review Automation, And OSS Housekeeping

• ID: PROD-045
• Title: Add label and triage automation for PRs and issues
• Type: improvement
• Priority: P2
• Scope: active
• Area: triage
• Description: Add lightweight labeling and intake automation so the repo can
  route bugs, security reports, protocol changes, release work, and docs work
  quickly without turning triage into manual bookkeeping.
• Acceptance criteria:
  • path-based PR labels are applied automatically
  • issue templates feed consistent labels for bug, security, docs, and ops
  • triage labels align with the GitHub project fields
• Dependencies: PROD-039
• Source docs: tracking-document-map.md,
  external benchmarks: milady/.github/labeler.yml,
  milady/.github/workflows/auto-label.yml
• Suggested owner: release
• Blocker class: non-blocking