feat(infra): full-surface integration suite + docs sync + publish prep

Full-surface integration suite (tests/full_surface.rs, mcp feature):
- one HttpAdapter over real TCP (ProtocolHandler::handle path) serving
  gateway endpoints, /openapi.json, /mcp, and the WS channels session
- gateway: search/schema/call/subscribe/batch/publish presence,
  envelope shapes, error fidelity end-to-end
- from_openapi import -> Internal-by-default invisible from the wire ->
  External facade composes it via env.invoke -> upstream HTTP API
  called end-to-end (ADR-015 composition model exercised)
- to_openapi 6-path doc validated against openapiv3 over the wire
- to_mcp: MCP client connects to /mcp on the served adapter, lists the
  4 gateway tools, search returns ACL-filtered ops (Sub excluded)

Production fix: the WS upgrade route was reserved but never wired into
HttpAdapter's router (the ws-upgrade-session tests built their own
router). Now wired with ws_bearer_auth (401 without a resolvable
token) around ws_upgrade_handler.

Docs sync: all 28 'Port notes' sections/blockquotes stripped from
ported ADRs/specs; OQ-01/OQ-02 statuses corrected to resolved in
overview.md, websocket.md, and the README table (open-questions.md was
already current).

Publish prep: cargo publish --dry-run --allow-dirty succeeds;
cargo doc --no-deps warning-free (ADR link targets fixed); feature
combinations (default / test-support / mcp / wss / all) compile
warning-free under clippy -D warnings.

Verified: cargo test (182 lib default), --all-features (227 lib + 29
integration), clippy -D warnings x3 feature sets, fmt, doc,
publish --dry-run.

docs/architecture/overview.md

@@ -285,12 +285,14 @@ invariant. See
 
 See [open-questions.md](open-questions.md) for full details.
 
-- **OQ-01** (open): WS message ↔ byte-stream adaptation — the channels
-  demux consumes bytes; axum WS yields messages. The adapter's
-  buffering/flush semantics are the core implementation risk.
-- **OQ-02** (open): `/publish` body framing details — NDJSON chunk
-  shape, error position.
-- **OQ-03** (open): `from_wss` reconnection semantics.
+- **OQ-01** (resolved): WS message ↔ byte-stream adaptation — the
+  production adapter (`src/websocket/byte_adapter.rs`) is validated in
+  both directions (server upgrade path + `from_wss` client).
+- **OQ-02** (resolved): `/publish` body framing — first line
+  `{operation, chunk}`; terminal errors as plain HTTP status + JSON
+  body (ADR-068).
+- **OQ-03** (open): `from_wss` reconnection semantics — v1 = drop →
+  retryable failures (ADR-070); policy deferred to the assembly layer.
 
 ## References