ContextCake 0.4.0

What's Changed

• feat(core): measure retrieval, then fix it (BM25F + eval harness) by @siracusa5 in #75
• feat(desktop): ship without accounts by default by @siracusa5 in #76
• feat: add privacy-first app adoption metrics by @siracusa5 in #82
• feat(desktop): sudo-free harness connect + consent sequencing by @siracusa5 in #84
• feat(core): conflict candor + formatting-equivalence resolution by @siracusa5 in #85
• docs: truth pass — download front door, version pins, keychain claims by @siracusa5 in #83
• feat(core): github-rest source kind, v2 manifest reads, mcp health by @siracusa5 in #86
• feat(console): N-source wizard + source management by @siracusa5 in #87
• chore(release): version bump for 0.4.0 + CLAUDE.md sweep by @siracusa5 in #88

Full Changelog: app-v0.3.0...app-v0.4.0