chore: DevKit conformance audit — nightly and release-gate workflows

[HerbHall]

DevKit Conformance Audit (2026-03-04)

Score: 85% — excellent, minor gaps

RunNotes has strong DevKit conformance. Only missing the newer nightly build and release gate workflows.

Gaps

• No nightly build workflow — nightly.yml not present
• No release gate workflow — release-gate.yml not present

What's Working

• CLAUDE.md: comprehensive (Go backend + Docker Desktop Extension)
• .claude/settings.json: present
• CI: 4 workflows (lint.yml, copilot-setup-steps.yml, release-please.yml, release.yml)
• Pre-push hook: present
• .markdownlint.json: present
• Makefile: 12+ targets
• .editorconfig: root = false (correct)
• release-please: configured (simple type)
• LICENSE: MIT
• VERSION: present

Recommended Actions

1. Copy project-templates/nightly-node.yml to .github/workflows/nightly.yml (replace {{DOCKER_IMAGE}})
2. Copy project-templates/release-gate.yml to .github/workflows/release-gate.yml

These are low priority — the project functions well without them.