Auto failover for LK Cloud; SIP media configs supported

What's Changed

• Fully configure frame processors when they are used directly on an audio stream by @1egoman in https://github.com/livekit/python-sdks/pull/679
• bump FFI to v0.12.67 by @chenghao-mou in https://github.com/livekit/python-sdks/pull/730
• livekit v1.1.12 by @github-actions[bot] in https://github.com/livekit/python-sdks/pull/727
• Update descriptions & comments to frame metadata by @chenosaurus in https://github.com/livekit/python-sdks/pull/731
• livekit-protocol v1.1.18 by @github-actions[bot] in https://github.com/livekit/python-sdks/pull/732
• feat: auto failover APIs with LK Cloud by @davidzhao in https://github.com/livekit/python-sdks/pull/733
• chore: update rust-sdks to livekit-ffi v0.12.68 by @xianshijing-lk in https://github.com/livekit/python-sdks/pull/735
• Fix failover CI by bypassing mock auth in failover tests by @cloudwebrtc with @Copilot in https://github.com/livekit/python-sdks/pull/737
• livekit v1.1.13 by @github-actions[bot] in https://github.com/livekit/python-sdks/pull/736
• Expose data track pipeline options by @ladvoc in https://github.com/livekit/python-sdks/pull/739
• Support SIP media configs. by @dennwc in https://github.com/livekit/python-sdks/pull/734
• improve timeout behavior by @davidzhao in https://github.com/livekit/python-sdks/pull/738
• avoid KeyError when track is already unpublished by @davidzhao in https://github.com/livekit/python-sdks/pull/743
• Update actions/checkout action to v7 by @renovate[bot] in https://github.com/livekit/python-sdks/pull/741
• chore: bump protocol for pii redaction by @chenghao-mou in https://github.com/livekit/python-sdks/pull/745
• rtc: fail fast instead of hanging when FFI is used across fork() by @theomonnom in https://github.com/livekit/python-sdks/pull/740
• livekit-protocol v1.1.19 by @github-actions[bot] in https://github.com/livekit/python-sdks/pull/746
• consistent error class ServerError, test suite by @davidzhao in https://github.com/livekit/python-sdks/pull/744
• Start AudioStream _run task after the FFI handle is assigned by @apoorva-01 in https://github.com/livekit/python-sdks/pull/742
• livekit-api v1.2.0 by @github-actions[bot] in https://github.com/livekit/python-sdks/pull/753

New Contributors

• @cloudwebrtc with @Copilot made their first contribution in https://github.com/livekit/python-sdks/pull/737
• @apoorva-01 made their first contribution in https://github.com/livekit/python-sdks/pull/742

Full Changelog: https://github.com/livekit/python-sdks/compare/api-v1.1.1...api-v1.2.0