commucat-proto

Framing and data structures for the CommuCat CCP-1 protocol.

• Frames are encoded as varint length + frame type + channel_id + sequence + payload bytes.
• Control payloads serialize as JSON (ControlEnvelope); media payloads remain opaque (FramePayload::Opaque).
• The call module contains the signalling models (CallOffer/Answer/End/Stats, CallTransport, incremental ICE updates).
• The optional obfuscation feature enables experimental helpers (hashing + noise injection).

The crate is shared by the server and client libraries to serialize/deserialize CCP-1 frames and enforce protocol limits.