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/cadence.yml

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+loop: registry-hygiene
+phase: bootstrap
+cron: "20 * * * *"
+batch_size: 3
+regulator_approval: pending
+notes: Hourly round-robin on custodian pilot slice; delegate SBOM to activity-core job

loops/registry-hygiene/health.jsonl

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+{"timestamp":"2026-06-18T10:16:00Z","loop":"registry-hygiene","phase":"bootstrap","tasks_created":0,"manual_rescues":0,"notes":"T01 signals/rollout committed; sweep disabled pending shell resolver"}

loops/registry-hygiene/rollout.yaml

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+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

loops/registry-hygiene/round-robin-state.json

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+{
+  "cursor_domain": "custodian",
+  "cursor_index": 0,
+  "last_run": null,
+  "last_batch": []
+}

loops/registry-hygiene/session-template.md

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+# scope-analyst hygiene session template
+
+LOOP-WP-0003 T03 — standard task for registry/orientation hygiene.
+
+## Prepare
+
+```bash
+kaizen-agentic schedule prepare scope-analyst --target <pilot-repo-root>
+```
+
+## Session steps
+
+1. Read `SCOPE.md` and `INTENT.md` in target repo
+2. Compare scope to actual repo purpose; update if stale (>90d or drift)
+3. Run `reuse-surface validate` in target repo
+4. If registry gaps: `reuse-surface establish --publish-check` (when touching registry)
+5. If `sbom_age_days > 30`: link to activity-core `weekly-sbom-staleness` — do not rescan
+6. File state-hub progress event on hygiene completion
+
+## Labels
+
+`fleet-hygiene`, `coulomb-loop`, `scope-analyst`
+
+## Reference
+
+- Signals: `loops/registry-hygiene/signals.yml`
+- Rollout: `loops/registry-hygiene/rollout.yaml`

loops/registry-hygiene/signals.yml

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+version: "1"
+
+signals:
+  registry_gap:
+    source: reuse-surface report gaps
+    action: scope-analyst session + establish --publish-check when registry touched
+    priority: medium
+  empty_capability_scaffold:
+    source: federation roster capability_count 0
+    action: draft capability entry or mark intentional
+    priority: low
+  stale_scope:
+    source: SCOPE.md mtime > 90d or missing
+    action: scope-analyst refresh
+    priority: medium
+  stale_sbom:
+    source: state-hub repo_sbom_status sbom_age_days
+    threshold_days: 30
+    action: link to activity-core weekly-sbom-staleness (do not duplicate scan)
+    priority: medium
+    delegate_definition: weekly-sbom-staleness
+    labels: [fleet-hygiene]
+  publish_check_fail:
+    source: federation roster publish_check fail
+    action: registry fix task
+    priority: high
+
+sbom_handoff:
+  owner: activity-core
+  definition: weekly-sbom-staleness
+  cron: "0 9 * * 1"
+  hygiene_role: flag_and_link_only