feat: advance LOOP-WP-0002/0003/0004 without activity-core blockers

Document event payload contract, draft disabled ActivityDefinitions for
CI/regulator/registry hygiene, initialize loop health snapshots and
regulator dashboard, record DEC-005 kaizen-stack promotion, and close
supplier-independent workplan tasks.

loops/registry-hygiene/rollout.yaml

@@ -0,0 +1,25 @@
+version: "1"
+batch_size_hourly: 3
+
+domains:
+  - slug: custodian
+    phase: pilot
+    repos:
+      - kaizen-agentic
+      - the-custodian
+      - activity-core
+  - slug: helix_forge
+    phase: queued
+    repos:
+      - reuse-surface
+  - slug: stack
+    phase: queued
+    repos:
+      - artifact-store
+      - open-reuse
+  - slug: coulomb_social
+    phase: queued
+    repos:
+      - vergabe-teilnahme
+
+expansion_after: LOOP-WP-0003 bootstrap exit + LOOP-WP-0004 regulator approval