Cut the first release (v0.1.0) now main is green

[jamesarich]

Main went green on 2026-07-16 with #49 (iOS sample arch fix) after being red since mid-June, unblocking the first real release. The only existing tag, v0.1.0-rc1, never triggered the Release workflow — its trigger pattern v[0-9]+.[0-9]+.[0-9]+ doesn't match -rc suffixes, so nothing has ever published.

Checklist (per docs/release-runbook.md):

• Shepherd the Renovate backlog: PRs created before the Kotlin 2.3.21 pin (build: pin Kotlin to 2.3.21 so the build compiles #47) need a rebase (tick the rebase boxes on Dependency Dashboard Dependency Dashboard #10); merge the ones that come back green
• Approve workflows / review external docs PR docs: remove UA_868 #52
• Decide whether draft feat(core): develop-only lockdown fields (disable, max_session_seconds, DISABLED) #7 (lockdown fields) lands before or after v0.1.0
• Finalize the CHANGELOG [Unreleased] section
• Signed tag v0.1.0 + push (runbook pre-flight: main green)
• Either widen the release.yml tag pattern to support -rcN tags, or document that rc tags are workflow_dispatch-only