[feat]: fetch files metadata along with the data when the actual indexing happens so it's not stale

[kyteinsky]

maybe here:

context_chat_backend/context_chat_backend/chain/ingest/injest.py

Lines 386 to 388 in 9c525e5

	populated_to_embed_sources, errored_sources = asyncio.run(
	__fetch_files_content(to_embed_sources, config.concurrent_file_fetches)
	)

this does not apply to the content providers since the updated metadata is already present in the db when the providers add data, it's de-duplicated based on ids on re-addition.

thanks @miaulalala