v2.9.0

[hiroshihorie]

Summary

Release 2.9.0 — consumes all 20 pending changesets (8 minor / 12 patch → minor bump), matching the published v2.9.0-dev.0 pre-release line.

Highlights

• Added: certificate pinning, RPC v2, audio engine availability + externalCallSystem mode for CallKit, AudioManager session/routing APIs, ConnectionCheck utility, microphone mute mode, runtime audio processing controls, desktop audio frame capture, VideoTrackRenderer placeholder
• Fixed: removal of the non-public buttonPressed: selector (App Store rejection risk), Android media routing / selectAudioOutput, audio processing lifecycle fixes, macOS platform video rendering, single disconnected event, video render mode switching

Release bookkeeping / repo organization

• Version bumped to 2.9.0 in .version, pubspec.yaml, both podspecs, lib/src/livekit.dart, and README
• Backfills the missing 2.8.1 CHANGELOG section — 2.8.1 was released from its branch without merging bookkeeping back, leaving main at 2.8.0 with two already-released changesets still pending; this PR reconciles that (the 2.9.0 section excludes the two entries that shipped in 2.8.1)
• Cherry-picks the docs/ → doc/ pub layout chore that was stranded on release/2.9.0-dev.0
• Declares the certificate-pinning test fixture key in false_secrets — without this, pub.dev rejects the publish (validated via dry-run)

Verification

• dart pub publish --dry-run passes (only the intentional flutter_webrtc exact-pin warning remains, same as prior releases)
• flutter analyze clean on the flutter-callkit example against this branch (only expected @experimental warnings)
• No stale 2.8.0 version references remain

After merge

1. Tag v2.9.0 on main → publish workflow pushes to pub.dev
2. Delete release/2.9.0-dev.0 (superseded by the stable release)

Note: the changeset-check workflow will warn "No changeset found" — expected for a release PR that consumes .changes/.

[github-actions]

Warning

No changeset found

If this PR includes user-facing changes, please add a changeset file in .changes/

Format: level type="kind" "description"

patch type="fixed" "Fix audio frame generation"
minor type="added" "Add support for custom audio processing"
major type="changed" "Breaking: Rename Room.connect() to Room.join()"

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.