chore(main): release 0.16.0-rc.3

[github-actions]

🤖 I have created a release beep boop

0.16.0-rc.3 (2026-05-18)

Added

• install: post-setup onboarding UX — repos empty-state CTA + admin/llm env-seeded callout (CA-540, CA-542) (74ddde3)

Fixed

• ci: correct docker/login-action pinned SHA (9525 -> 9925) (6e29148)
• ci: correct setup-qemu-action pinned SHA (v3.7.0) (dc32170)
• helm: init wait for SurrealDB + LLM env to API + repo-cache volume (F7, F8, F9) (b9daf63)
• install: close 3 first-install rough edges — CSP dev unsafe-eval, /setup redirect, AI key env-var wiring (CA-537, CA-538, CA-539) (a35753f)
• install: hub compose port default 8280 + LLM env propagation to API (F2, F3) (53c616e)
• install: web healthcheck uses 127.0.0.1 not localhost (F10) (e198e4b)
• rest,docs: /api/v1/ask accepts snake_case repository_id + clarify MCP gate (F4, F5) (ca0e8d5)

Documentation

• 2026-05-17-deliver-first-install-rough-edges: CHANGELOG + CLAUDE.md + promote artifacts to finished/ (d42c0b3)
• 2026-05-18-deliver-post-setup-onboarding-ux: CHANGELOG + CLAUDE.md + promote artifacts (53127f1)
• add GETTING-STARTED.md + wire it from README and start-here (9bd0ced)
• CLAUDE.md: record commit SHA for O-M4 multi-arch entry (92d37cf)
• rename docs/user/getting-started.md + de-demo-ify start-here.md (CA-543, CA-544) (cd49432)

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