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

package.json

@@ -36,6 +36,16 @@
         "types": "./dist/from-typemap.d.cts",
         "default": "./dist/from-typemap.cjs"
       }
+    },
+    "./from-openapi": {
+      "import": {
+        "types": "./dist/from-openapi.d.ts",
+        "default": "./dist/from-openapi.js"
+      },
+      "require": {
+        "types": "./dist/from-openapi.d.cts",
+        "default": "./dist/from-openapi.cjs"
+      }
     }
   },
   "publishConfig": {