Remove Noise protocol references from wiki docs and tests

Delete 8 Noise-specific documentation pages (noise-xx.md,
transport-keys.md, adr-001/003/006, framing-codec.md) and update
~30 remaining wiki pages to reflect QUIC+TLS as the sole transport.
Remove obsolete Noise-based integration tests (auth_service.rs,
mls_group.rs). Code-side Noise removal was done in f334ed3.

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

docs/src/contributing/coding-standards.md

@@ -135,7 +135,6 @@ updates are allowed; major version bumps require justification and review.
 |--------|-------------------|
 | Classical crypto (signing) | `ed25519-dalek` |
 | Classical crypto (key exchange) | `x25519-dalek` |
-| Noise protocol | `snow` |
 | MLS | `openmls`, `openmls_rust_crypto` |
 | Post-quantum KEM | `ml-kem` |
 | Serialisation / RPC | `capnp`, `capnp-rpc` |

docs/src/contributing/testing.md

@@ -40,7 +40,6 @@ within the same test binary, then runs client operations against it.
 
 | File | Milestone | What it covers |
 |------|-----------|---------------|
-| `noise_transport.rs` | M1 | Noise\_XX handshake over TCP, Ping/Pong frame exchange, connection lifecycle |
 | `auth_service.rs` | M2 | KeyPackage upload via AS, KeyPackage fetch (single-use consume semantics), identity key validation |
 | `mls_group.rs` | M3 | Full MLS round-trip: register state, create group, add member via Welcome, send encrypted message, receive and decrypt |
 
@@ -121,8 +120,8 @@ Summary:
 | `quicnprotochat-core` | 23 | -- | 23 |
 | `quicnprotochat-proto` | 3 | -- | 3 |
 | `quicnprotochat-server` | 0 | -- | 0 |
-| `quicnprotochat-client` | 0 | 6 | 6 |
-| **Total** | **26** | **6** | **32** |
+| `quicnprotochat-client` | 0 | 5 | 5 |
+| **Total** | **26** | **5** | **31** |
 
 ---
 
@@ -179,8 +178,6 @@ Fuzz testing for parser and deserialisation code:
   no undefined behaviour).
 - **MLS message handler:** Feed arbitrary `MLSMessage` bytes to the
   `GroupMember::receive_message` path.
-- **Length-prefixed codec:** Fuzz the frame decoder with arbitrary byte streams.
-
 Tool: `cargo-fuzz` with `libfuzzer`.
 
 ### Golden-Wire Fixtures (M5+)
@@ -214,7 +211,6 @@ Performance benchmarks using [Criterion.rs](https://docs.rs/criterion/):
 - MLS encap/decap (KeyPackage generation, Welcome processing).
 - Group-add latency scaling: 2, 10, 100, 1000 members.
 - Cap'n Proto serialise/deserialise throughput.
-- Noise handshake latency.
 
 Benchmarks run separately from tests (`cargo bench`) and are not part of the
 CI gate, but are tracked for regression detection.