Prompt only captures first message when other person sends multiple in a row

[NotYuSheng]

Problem

In format_conversations (scripts/telegram_extract.py), when the other person sends several messages consecutively before you reply, only the first is used as the prompt. The rest are silently skipped because i = j jumps past them.

Example

Other: "hey"
Other: "are you free tonight?"   ← skipped
Other: "let me know asap"        ← skipped
You:   "yeah sure"

Only "hey" becomes the prompt, losing context.

Expected behavior

Consecutive messages from the same sender should be concatenated or treated as a single prompt before extracting the response.