fix: resolve M-01..M-02, M-05..M-08, L-01..L-03, L-05 from pre-release review

M-01: Compose OperationDefinitionSchema from OperationSpecSchema via Type.Intersect
M-02: Extract from_openapi to subpath export, remove from main entry
M-05: Fix mapError fragile includes() matching — use startsWith(code+':') or exact
M-06: Replace any casts with MCPClientLike/MCPToolResult interfaces in from_mcp
M-07: Add injectable fetch to HTTPServiceConfig for from_openapi
M-08: Add OpenAPIServiceRegistry with lifecycle methods (add, remove, registerAll)
L-01: Validate subscription handler type at registration and runtime
L-02: Strengthen isResponseEnvelope with source-specific field validation
L-03: Add logger.warn on FromSchema fallback to Type.Unknown
L-04: Noted as intentional (SSE GET body handling)
L-05: Add registerAll to MCPClientLoader and OpenAPIServiceRegistry

test/env.test.ts

@@ -92,8 +92,9 @@ describe("buildEnv", () => {
   it("filters out SUBSCRIPTION operations", () => {
     const registry = new OperationRegistry();
     registry.register(makeOperation("query"));
+    async function* subHandler(input: any) { yield { result: input.value }; }
     registry.register({
-      ...makeOperation("onEvent"),
+      ...makeOperation("onEvent", subHandler),
       type: OperationType.SUBSCRIPTION,
     });