Twitter API sometimes returns partial errors (e.g., is_translatable field
failures) alongside valid thread data. Previously, any error caused the
entire request to fail even when usable data was present.
Now we check if threaded_conversation_with_injections_v2.instructions
exists before failing on errors, allowing successful thread fetching
despite non-fatal API errors.
Co-Authored-By: Claude Opus 4.5 <[email protected]>
