e14bcfb08a
`SDK_RENDERERS` and `RUN_CODE_FLAVORS` had to stay in step by review alone: the `Object.hasOwn` guards catch drift only once a runtime reporting the half-added language exists, which is the one case that cannot arise. Both tables are now `satisfies`-checked against a shared `CodeSdkLanguage` union, so a missing or extra entry fails `typecheck`. The declared `Record<string, …>` type stays, since `CodeRuntime.language` is an unconstrained `string`. The code-runtime seam's own README row and `CodeRuntime.language` JSDoc still named `'typescript'` as the sole well-known value; both now name `'python'` too and say only `'typescript'` has a published backend.