S8 (a1): ops — the product watches itself

Settlement alarm (settle-pass THROW pages high; morning zero-settle alarm
keyed off the Postgres ledger settle results, once per ET date, never on an
empty yesterday), per-sport 3-consecutive-slot failure pager (pure
opsWatch.createFailureTracker, pages once per losing streak), odds-api >=80%
quota alert (once per day, Redis-deduped), systemHealth (statfs + os mem,
disk>85 / mem>90 pages), daily 9 AM ET pulse (ONE notification: ledger rows
yesterday via ledgerService.countRowsForDate, settles 24h, quota, disk/mem,
desk line), docs/OPS-RUNBOOK.md (Uptime Kuma monitors, Coolify
deploy-failure -> ntfy, phone subscription). All copy VOICE v1.1 — deadpan,
numbers, no exclamation points (tests lint for it). 2398 -> 2437 tests.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/services/ledgerService.js

@@ -361,6 +361,27 @@ async function defaultGetPlayerStats(name, sport) {
   return { found: false }; // no free settled-result feed yet → pending
 }
 
+/**
+ * Session 8 (A1 board, ops) — count of ledger rows for one game_date (the
+ * daily pulse's "rows written yesterday"). Returns null (NOT 0) when Supabase
+ * isn't configured or the count fails — the pulse renders "n/a", never a
+ * fabricated zero.
+ */
+async function countRowsForDate(gameDate, opts = {}) {
+  if (!gameDate) return null;
+  if (!opts.sb && !isConfigured()) return null;
+  try {
+    const sb = opts.sb || defaultClient();
+    const { count, error } = await sb.from('ledger_entries')
+      .select('id', { count: 'exact', head: true })
+      .eq('game_date', gameDate);
+    if (error) return null;
+    return count || 0;
+  } catch {
+    return null;
+  }
+}
+
 /**
  * 30-day aggregate over the PUBLIC model record (user_id NULL): hit rate,
  * beat-the-close rate, pending count. Percentages are null below
@@ -453,6 +474,7 @@ module.exports = {
   settleLedger,
   settleAllLedgers,
   applyRevision,
+  countRowsForDate,
   getModelAggregate,
   MIN_AGG_SAMPLE,
   __internals: {