feat: WarzonePhone lossy VoIP protocol — Phase 1 complete

Rust workspace with 7 crates implementing a custom VoIP protocol
designed for extremely lossy connections (5-70% loss, 100-500kbps,
300-800ms RTT). 89 tests passing across all crates.

Crates:
- wzp-proto: Wire format, traits, adaptive quality controller, jitter buffer, session FSM
- wzp-codec: Opus encoder/decoder (audiopus), Codec2 stubs, adaptive switching, resampling
- wzp-fec: RaptorQ fountain codes, interleaving, block management (proven 30-70% loss recovery)
- wzp-crypto: X25519+ChaCha20-Poly1305, Warzone identity compatible, anti-replay, rekeying
- wzp-transport: QUIC via quinn with DATAGRAM frames, path monitoring, signaling streams
- wzp-relay: Integration stub (Phase 2)
- wzp-client: Integration stub (Phase 2)

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

crates/wzp-transport/src/lib.rs

@@ -0,0 +1,29 @@
+//! WarzonePhone Transport Layer
+//!
+//! QUIC-based transport using quinn with:
+//! - DATAGRAM frames for unreliable media packets
+//! - Reliable streams for signaling messages
+//! - Path quality monitoring (EWMA loss, RTT, bandwidth estimation)
+//! - Connection lifecycle management
+//!
+//! ## Architecture
+//!
+//! - `config` — QUIC configuration tuned for lossy VoIP links
+//! - `datagram` — DATAGRAM frame serialization and MTU management
+//! - `reliable` — Length-prefixed JSON framing over reliable QUIC streams
+//! - `path_monitor` — EWMA-based PathQuality estimation
+//! - `quic` — `QuinnTransport` implementing the `MediaTransport` trait
+//! - `connection` — Connection lifecycle (create endpoint, connect, accept)
+
+pub mod config;
+pub mod connection;
+pub mod datagram;
+pub mod path_monitor;
+pub mod quic;
+pub mod reliable;
+
+pub use config::{client_config, server_config};
+pub use connection::{accept, connect, create_endpoint};
+pub use path_monitor::PathMonitor;
+pub use quic::QuinnTransport;
+pub use wzp_proto::{MediaTransport, PathQuality, TransportError};