Windsurf Manual @ Rule Activation

Use Windsurf's Manual activation scope (triggered via @ mention in prompts) for specialized workflows like release checklists so they do not consume your 12,000-character combined active rule budget during normal coding.

File: .windsurf/rules/release-checklist.md (Scope: Manual via @release-checklist)

1. Verify changelog entry under ## [Unreleased].
2. Run full type-check and integration test suite.
3. Bump semantic version in package.json.