Christian Gick 5973ed1db3 fix(voice): revert to KDF_HKDF=1 with raw keys — proto value 0 is PBKDF2 not raw ...

e2ee_patch.py shows KDF_PBKDF2=0, KDF_HKDF=1.
Our KDF_NONE=0 was actually PBKDF2, double-deriving keys and causing silence.
Removed Python HKDF pre-derivation — let Rust FFI apply HKDF internally.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-02-22 09:26:44 +02:00

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