Add query param to cache JSON uploads

Add query param `cache` to mark if the content should be cached or not

If query param is present images should be uploaded to cfi and other content to R2

Tasks:

1. In `/pinJaon` handler
2. If `cache=true`
3. normalize content according to kodadot1/hyperdata
4. Save to KV

Start at the `/pinJaon` handler and review the normalization rules in `kodadot1/hyperdata`, along with the existing upload paths. Done means `cache=true` routes images to cfi and other content to R2, normalizes the content, and saves it to KV.

Written by the indexing model from the issue text.