feat: complete LOOP-WP-0001 bootstrap exit and daily cadence promotion

Record 3/3 consecutive hourly E2E cycles, session-close metrics on all
pilots, and promote kaizen stack to stabilize phase (daily 08/09/10 crons).

loops/kaizen-stack/cadence.yml

@@ -1,7 +1,13 @@
 loop: kaizen-improvement-stack
-phase: bootstrap
-cron: "0 * * * *"
-promoted_at: null
+phase: stabilize
+cron: "0 8 * * *"
+chain:
+  metrics: "0 8 * * *"
+  coach: "0 9 * * *"
+  optimization: "0 10 * * *"
+promoted_at: "2026-06-18"
 demotion_count: 0
-regulator_approval: pending
-notes: Hourly chain — metrics :00, coach :15, optimization :30 (per-repo schedule.yml)
+regulator_approval: approved
+notes: >
+  Promoted from bootstrap hourly after 3/3 consecutive E2E cycles (2026-06-18).
+  Daily chain — metrics 08:00, coach 09:00, optimization 10:00 Europe/Berlin.