docs: prepare App Store launch readiness

[tmad4000]

Summary

• Refresh App Store privacy labels and public privacy policy for v0.1.23 data flows
• Add App Store launch readiness checklist with review notes, commands, and human-gated blockers
• Link the launch checklist from tester/release docs and track follow-up human-gated submission work in Beads

Verification

• npm run build --workspace=apps/server

Notes

• No App Store submission, TestFlight upload, production deploy, reviewer-account creation, or credential handling was performed.
• no-mistakes could not start a run for this branch because the local daemon is awaiting a gate on an unrelated branch; I did not respond to that unrelated gate.