Christian Gick c11dd73ce3 fix: handle Element X MSC4143 v2 encryption key format (memberships array) ...

Element X embeds E2EE keys inside memberships[].encryption_keys,
not at the top level of the call.member state event content.
Bot was only checking content.encryption_keys, so it never found
the caller's key — causing 'Warten auf Medien' (waiting for media)
because encrypted audio couldn't be decrypted.

- Added _extract_enc_keys_from_content() helper handling both formats
- Updated on_unknown handler, VoiceSession creation, and key fetch
- Bot now publishes keys in both formats for compatibility
- Updated voice.py state fetch to check memberships[] fallback

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-24 08:57:24 +02:00

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