* fix: search sync + sentry errors issues
Fixes two issues:
1. Search sync: The embedded content now includes denormalized examples,
so the examples codegen needs to be run before embeddings are
created. Otherwise, the GitHub Action will fail because it cannot
find the examples to use for content inclusion.
2. Sentry errors on pages that fail to load: Sentry errors were being
sent for genuine 404s because the check for FileNotFoundErrors was
wrong. The error that is caught is wrapped in a new Error by
Result.unwrap(), so it's the child of this error, error.cause, that
is potentially a FileNotFoundError, not the error itself.
* fix: remove double processing of mdx
9551315f6a