Release v2.0.0-rc1

v2.0.0-rc1 — WebRTC & Event Entity Preview

First release candidate for the 2.x series. This is a pre-release for testing only — install via HACS with "Show beta versions" enabled.

New Features

WebRTC Camera (camera.py)

• Native Home Assistant WebRTC camera entity with live video streaming
• Full WebRTC signaling via pybticino.SignalingClient (offer/answer/ICE/terminate)
• Integrates with HA's WebRTC infrastructure (async_handle_async_webrtc_offer)

Doorbell Event Entity (event.py)

• New EventDeviceClass.DOORBELL entity that fires "ring" events on incoming calls
• Works alongside the existing binary sensor for backward compatibility

Restructured Coordinator

• Separated RTC events (offer/rescind/terminate) from status events (incoming_call/missed_call/accepted_call)
• Active call state tracking for WebRTC signaling
• Call retransmission deduplication with watchdog timers (ported from 1.9.x)
• Real-time snapshot/vignette delivery from BNC1-incoming_call push (ported from 1.9.6-rc2)

What Needs Testing

• WebRTC video streaming — does the camera show live video when the doorbell rings?
• Event entity — does the doorbell event fire correctly in automations?
• Snapshot delivery — are snapshot/vignette available immediately (not delayed 5 min)?
• Call lifecycle — offer → answer/terminate/rescind/missed_call flow

Known Limitations

• SDP fixing, TURN discovery, and session refresh (Phase 2) are not yet implemented
• Two-way audio (Phase 4) is not yet implemented
• Requires pybticino>=1.7.1

Testing Instructions

1. HACS → Integrations → BTicino Intercom → enable "Show beta versions" → Update to 2.0.0-rc1
2. Restart Home Assistant
3. Check that the new WebRTC camera and doorbell event entities appear
4. Ring the doorbell and verify video stream + event firing

Full Changelog: v1.9.6-rc2...v2.0.0-rc1