feat(websocket): WS upgrade route + channels session (server producer half)
- src/websocket/byte_adapter.rs: production WsByteStream from the POC —
inbound bounded mpsc (64 slots, backpressure), outbound chunk parser
emitting one WS message per chunk with 1 MiB split; write-side
backpressure now uses futures mpsc poll_ready (POC spin-wait fixed);
text messages closed with 1002; close mapping per websocket.md
- src/websocket/upgrade.rs: /alk/channels upgrade route — bearer auth
(401 unresolvable), identity attached to the channels Connection,
ChannelsAdapter + install_channel_zero running
Dispatcher::run_loop_single_stream
- test_support module (feature test-support): WsClient, chunk/frame
assemblers; shared with from_wss consumer path (ADR-070)
- tests/ws_upgrade_session.rs: 10 integration tests — call round-trip,
services/list ACL-filtered, 3 MiB split, interleaved calls, ACL 403,
internal-op NOT_FOUND, text->1002 close, disconnect mid-call no-hang
Verified: cargo test (95), cargo test --all-features (95+10),
clippy -D warnings (default + all-features), fmt.
glm-5.3-flash
4ba9b652b3