Harden the daily FI prompt and enforce minimum signal so green runs are
not empty templates. Raise default max_tokens. Push origin after commit
when enabled so workstation/Forgejo see briefs (diverged repos still OK).
activity-core owns schedule and spawn; rein-aharness executes the research
brief via llm-connect, commits the artifact, and posts fi_daily_brief for
fi_brief_status idempotence — same layering as brief-daily for Binky.
