test: add integration tests with mock control server

[forkwright]

Problem

Zero integration tests exist. The full protocol flow (TCP connect → TLS → HTTP upgrade → Noise handshake → register → map stream) is never tested end-to-end. wire.rs only tests URL parsing.

Required

1. Mock TLS server using rcgen (test cert generation) + rustls ServerConfig
2. Mock implements: GET /key?v=71, POST /ts2021 upgrade, register RPC, map streaming
3. Tests:
   • connects_and_completes_noise_handshake
   • register_returns_authorized_on_valid_preauth_key
   • register_returns_needs_auth_when_no_key
   • map_stream_applies_initial_full_response
   • map_stream_handles_delta_updates
   • map_stream_keepalive_does_not_modify_netmap
   • disconnected_server_returns_wire_error
   • malformed_http_response_returns_error

Location

crates/dictyon/tests/wire_integration.rs

Dependencies

Add rcgen to [dev-dependencies].