Plumbs persistSession through the structured response pipeline so
metadata, branch name, commit message, and PR text generators no
longer leave provider-side artifacts behind:
- Codex: passes ephemeral: true on thread/start (no rollout file)
- OpenCode: deletes the session via session.delete on close
- Claude: forwards persistSession: false to the SDK query
Adds a real-credentials e2e test per provider that asserts the
generated title is applied AND no persistence artifact is produced
(rollout for Codex, project JSONL for Claude, leftover session for
OpenCode).
Mohamed Boudra
12fcfe53eb