fix(code-runtime-python): declare the MIT license the package gate requires

master added verify-dsh-package-licenses while this branch was open: every
repository-owned DSH package must declare "license": "MIT". This package
carried BSD-3-Clause from its creation, so the gate failed and took the
required "node 24 / static" lane down with it.

packages/code-runtime/code-runtime-python/package.json

@@ -30,7 +30,7 @@
     "py/**/*.py",
     "lib/types/**/*.d.ts"
   ],
-  "license": "BSD-3-Clause",
+  "license": "MIT",
   "peerDependencies": {
     "@deepseek-ai/dsh-invariants": "workspace:^",
     "@deepseek-ai/cordis": "workspace:^"