Part of Val Town Semantic Search.

Generates OpenAI embeddings for all public vals, and stores them in Val Town's blob storage.

• Create a new metadata object. Also has support for getting the previous metadata and only adding new vals, but that's currently disabled.
• Get all val names from the database of public vals, made by Achille Lacoin.
• Put val names in batches. Vals in the same batch will have their embeddings stored in the same blob, at different offsets.
• Iterate through all each batch, get code for all the vals, get embeddings from OpenAI, and store the result in a blob.
• When finished, save the metadata JSON to its own blob.
• Can now be searched using janpaul123/semanticSearchBlobs.

Migrated from folder: semanticSearchPrototype/indexValsBlobs