fix(package.json): explicit test file path for Node v25 compatibility

node --test <dir>/ broke in Node v25 (tries to load as CJS module).
Explicit filename works on v18..v25.

https://claude.ai/code/session_01AQeaZPrDneQqFYxwxVTJqm

Author: claude

package.json

@@ -50,9 +50,8 @@
   },
   "scripts": {
     "start": "node mcp-bridge/main.js",
-    "test": "node --test mcp-bridge/tests/",
-    "inspect": "node --test mcp-bridge/tests/dispatch_test.js",
-    "prepublishOnly": "node --test mcp-bridge/tests/"
+    "test": "node --test mcp-bridge/tests/dispatch_test.js",
+    "prepublishOnly": "node --test mcp-bridge/tests/dispatch_test.js"
   },
   "engines": {
     "node": ">=18.0.0"