* fix(ralph-loop): detect completion promise from session messages API
The completion promise (e.g., <promise>DONE</promise>) was not being detected
because assistant text messages were never recorded to the transcript file.
Only user messages, tool uses, and tool results were recorded.
This fix adds a new detection method that fetches session messages via the
OpenCode API and checks assistant text messages for the completion promise.
The transcript file check is kept as a fallback.
Fixes#412
* refactor(ralph-loop): address review feedback
- Simplify response parsing to use response.data consistently (greptile)
- Add session ID tracking to messages mock for better test coverage (cubic)
- Add assertion to verify correct session ID is passed to API
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Co-authored-by: sisyphus-dev-ai <sisyphus-dev-ai@users.noreply.github.com>
3ba61790ab