Let's safe last traceback only in the vector db

[lpiwowar]

Maybe we could update the tools repo as well so that we store in the vector db the last traceback only as well [1].

[1]

tools/data_scraper/processors/ci_logs_provider.py

Line 187 in e294a89

traceback_text = row_text[traceback_start_index:]

Originally posted by @lpiwowar in RCAccelerator/chatbot#160 (review)