Handle Bill Text Limit

## Summary

Now that we're scraping the text of longer bills from the PDFs, we're seeing occasional errors where a Bill would exceed the maximum acceptable size of a Firebase document (~1 MiB). This prevents scraping of the bill altogether - which is

Instead of failing altogether, we should handle this case more gracefully:
* Catch failed Firestore writes around `maximum allowed size` and re-try saving the Bill document without the DocumentText (basically, the current behavior where we only have the PDF)

## Success Criteria
- [ ] Bills with excessively long DocumentText can be mostly successfully scraped (by excluding the long DocumentText field)

## Additional Info
* Error: In `fetchBillBatch`: `Error: 3 INVALID_ARGUMENT: Document 'projects/digital-testimony-dev/databases/(default)/documents/generalCourts/194/bills/H5500' cannot be written because its size (1,373,153 bytes) exceeds the maximum allowed size of 1,048,576 bytes.`

* Example Bill: Bill H5500 in Court 194