v1.2.5-fork-rc4 — fixes blocking-call warning

Test candidate. Same Sonos, Cast and cloud TTS fixes as rc3, plus a fix for a blocking-call warning.

Fixed since rc3

• Blocking-call warning on Sonos announcements: the integration copied the audio into the www folder directly on the event loop, which logged "Detected blocking call to open ... shutil.copy". The copy and folder creation now run off the event loop. Audio always played; this only removes the log warning.

Also in this build

• Nabu Casa Cloud TTS: tts_platform: cloud resolves correctly again (no more "The tts.cloud platform was not found").
• Sonos: avoids the authentication bans from re-fetching an expired URL; settle delay before playback.
• Google Cast / Nest: stops the start of the chime or first word getting clipped.

Install (HACS custom repository)

1. HACS > three dots > Custom repositories.
2. Add https://github.com/derekcentrico/chime_tts, category Integration.
3. Enable "show beta versions", install this version, restart Home Assistant.

Reports on Sonos, Cast/Nest, and cloud TTS are all helpful. Please mention your device and model.