Merge feat/http-from-openapi: from_openapi adapter (OpenAPI parser, reqwest forwarding, no-env-vars)
Implements FromOpenAPI in src/adapters/from_openapi.rs: OpenAPISpec/HttpServiceConfig/
HttpAuthScheme types, $ref resolution, OperationAdapter::import() producing
HandlerRegistration bundles (Internal visibility, FromOpenAPI provenance,
HTTP_<status> error codes per ADR-023). Reqwest forwarding handlers read credentials
from OperationContext.capabilities (no-env-vars ADR-014) via SharedHttpClient.
JSON/text/binary response branching, SSE subscription streaming, Bearer/ApiKey/Basic
auth injection. 98 tests pass.
glm-5.2
ad8d7879ae