ac (sourcetree) 2046a4c08c fix: backfill model on gateway sessions after agent runs ...

Gateway sessions end up with model=NULL because the session row is
created before AIAgent is constructed.  After the agent responds,
update_session() writes token counts but never fills in the model.

Thread agent.model through _run_agent()'s return dict into
update_session() → update_token_counts().  The SQL uses
COALESCE(model, ?) so it only fills NULL rows — never overwrites
a model already set at creation time (e.g. CLI sessions).

If the agent falls back to a different provider, agent.model is
updated in-place by _try_activate_fallback(), so the recorded value
reflects whichever model actually produced the response.

Fixes #987

2026-03-14 06:42:57 -07:00

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