BINKY-WP-0004-T01: kaizen schedule opt-in + executor ownership decision

- .kaizen/schedule.yml scaffolded via schedule init, validates clean
  (coach + optimization weekly, tdd-workflow disabled)
- DEC-2026-002 prepared: executor worker in a new small repo, per
  ADR-005 boundaries; fallback allows sandbox prototype, no cutover
  before resolution
- Decision rationale recorded in the executor assessment

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

.kaizen/schedule.yml

@@ -0,0 +1,17 @@
+# Kaizen scheduled agent execution manifest (ADR-005)
+# Declares which agents run on what cadence in this repo.
+# Validate with: kaizen-agentic schedule validate
+version: '1'
+timezone: Europe/Berlin
+agents:
+  coach:
+    cadence: weekly
+    cron: 0 9 * * 1
+    enabled: true
+  optimization:
+    cadence: weekly
+    cron: 0 10 * * 1
+    enabled: true
+  tdd-workflow:
+    cadence: monthly
+    enabled: false