Implements call_error_to_http_status, call_error_to_http_status_with_identity,
and call_error_to_http_response in src/gateway/error.rs. Five protocol codes
map to fixed statuses (404/422/504/500 + 401/403 split for FORBIDDEN).
HTTP_<status>-prefixed operation-level codes parse status from prefix. Unknown
operation-level codes default to 500. Retry-After header for retryable 503/429.
21 unit tests.
# Conflicts:
# crates/alknet-http/src/gateway/mod.rs
Add gateway/error.rs with call_error_to_http_status,
call_error_to_http_status_with_identity, and call_error_to_http_response.
Maps the five protocol codes (NOT_FOUND/FORBIDDEN/INVALID_INPUT/TIMEOUT/
INTERNAL) to fixed HTTP statuses, splits FORBIDDEN into 401 (no identity) /
403 (identity present), maps HTTP_<status>-prefixed operation-level codes
to the status number (from_openapi fidelity), and defaults unknown
operation-level codes to 500. Retryable 503/429 errors carry a Retry-After
header when details.retry_after is present.
Thin concrete struct (not a trait) holding Arc<OperationRegistry> +
Arc<dyn IdentityProvider>. Exposes resolve_bearer() (delegates to
identity_provider.resolve_from_token) and invoke() which builds a root
OperationContext for wire-ingress (internal: false, forwarded_for: None,
fresh UUID v4 request_id, deadline now+30s) carrying the registration
bundle's composition_authority/capabilities/scoped_env, then calls
OperationRegistry::invoke. Dispatches services/list and services/schema
unchanged (registered ops); AccessControl filtering in services/list
sees the caller's resolved identity. Re-exported from lib.rs.
Duplicates Dispatcher::build_root_context construction (the alknet-call
version is pub(crate) and tangled with CallConnection peer/session
overlays); the invariants (internal: false, forwarded_for: None) are
the load-bearing part and identical to the wire-ingress path.
Add crates/alknet-http with Cargo.toml, src/lib.rs, and the five
subsystem modules (server, gateway, client, adapters, websocket) per
ADR-039 (server + client host colocated). The mcp feature gate pulls in
rmcp with streamable HTTP transport features only (ADR-037 — no stdio);
h3/WebTransport is absent (deferred per ADR-044). alknet-core and
alknet-call use workspace path deps. The crate is added to the workspace
members list.
