Backend:
- metrics.decision_outcome_summary(conn, since_days=7): route_decisions
count in 7d window + verifications kind='client_outcome' counts
(total / succeeded / failed), parameterized like verdict_mix.
- admin_snapshot exposes it as "decision_outcomes" (zeros on empty DB).
Frontend (renderBoard Decisions tile):
- One guarded local `dout` (|| defaults) so a stale tab without the
snapshot key cannot throw and blank the board.
- Headline = decisions in 7 days; qualifier "routed in 7 days".
- Client-outcome line when client_reports > 0:
"<n> client reports (P%): <ok> ok, <failed> failed" where P is
guarded against decisions===0 (percent omitted, counts kept) and the
failed count gets the warn colour when failed/reports > 0.10
(matching the Signal card's >10% threshold), guarded against
client_reports===0.
- "no client reports in 7 days" when client_reports===0.
- The word "verified" no longer appears in the tile; renderLive keeps
verdict_mix untouched.
Tests: unit tests for the summary (window exclusions, client_outcome
scoping, structural verdicts excluded), exhaustive snapshot key +
zeros assertion, top-level key list, and static renderBoard/renderLive
regex locks. Append-only.
