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/error.test.ts

@@ -50,6 +50,20 @@ describe("mapError", () => {
     expect(result.code).toBe("NOT_FOUND");
   });
 
+  it("does not false-positive on substring match (ITEM_NOT_FOUND vs NOT_FOUND)", () => {
+    const result = mapError(new Error("ITEM_NOT_FOUND: nope"), [
+      { code: "NOT_FOUND", schema: {} },
+    ]);
+    expect(result.code).toBe(InfrastructureErrorCode.EXECUTION_ERROR);
+  });
+
+  it("matches exact code equality", () => {
+    const result = mapError(new Error("NOT_FOUND"), [
+      { code: "NOT_FOUND", schema: {} },
+    ]);
+    expect(result.code).toBe("NOT_FOUND");
+  });
+
   it("maps non-Error to UNKNOWN_ERROR", () => {
     const result = mapError("string error");
     expect(result.code).toBe(InfrastructureErrorCode.UNKNOWN_ERROR);