Release P5-T1: Prepare 0.4.0 release — CHANGELOG date and quality gate verification

[SoundBlaster]

Summary

• Update CHANGELOG.md [0.4.0] date from placeholder 2026-02-20 to actual release date 2026-03-06
• Verify all quality gates pass on current main HEAD before tag creation
• Document exact manual release commands for human operator (tag push + CI/CD triggers PyPI and MCP Registry publish)

Quality Gates Verified (all PASS)

Gate	Result
make test	785 passed, 5 skipped — 90.91% coverage (≥ 90% required)
make lint	0 ruff errors
make format-check	49 files already formatted
make typecheck	mypy: 0 issues in 18 source files
make doccheck-all	DocC sync clean across unstaged/staged/branch
make package-assets-check	Web UI assets present in wheel + sdist

Release Artifact Status

Artifact	Value
pyproject.toml version	0.4.0
server.json version	0.4.0
CHANGELOG.md [0.4.0] date	2026-03-06 (updated)
CI/CD publish trigger	push: tags: ["v*"] in publish-mcp.yml

Manual Release Steps (human operator, post-merge)

After merging this PR, the release operator must run:

# 1. Get latest main
git checkout main && git pull origin main

# 2. Tag and push — this triggers publish-mcp.yml automatically
git tag -a v0.4.0 -m "Release 0.4.0 — broker mode, Web UI, auto-restart, tools cache"
git push origin v0.4.0

# 3. Monitor CI/CD at:
#    https://github.com/SoundBlaster/XcodeMCPWrapper/actions
#    (Jobs: "Publish package to PyPI" and "Publish server to MCP Registry")

# 4. Verify after ~5 min:
pip install mcpbridge-wrapper==0.4.0
uvx mcpbridge-wrapper[webui] --version   # should print: 0.4.0

# 5. Check MCP Registry:
#    https://registry.modelcontextprotocol.io/?q=Xcode

What is NOT in this PR (by design)

• The git tag v0.4.0 push — requires human confirmation and PyPI OIDC credentials active in CI
• Actual PyPI publish — triggered automatically by the tag push via publish-mcp.yml
• MCP Registry publish — triggered automatically by the same CI workflow

Test plan

• make test — 785 tests pass, 90.91% coverage
• make lint && make format-check — zero ruff issues
• make typecheck — mypy clean
• make doccheck-all — DocC mirrors in sync
• make package-assets-check — Web UI assets in both wheel and sdist
• grep "[0.4.0]" CHANGELOG.md → ## [0.4.0] - 2026-03-06

🤖 Generated with Claude Code