feat: Phase 1 FDA host-operator Role and railiance01 pilot (WP-0009 T02–T07)

Lock DEC-FDA-001 working defaults; add roles/host-operator package with
OS/security and load protocols; scaffold eng-coulomb-railiance01-ho-001
with bound agent, vault, ramp checklists, and Kai quote/ledger.

roles/host-operator/ROLE.yaml

@@ -0,0 +1,61 @@
+# Host Operator — supplier Role package
+# See docs/forward-deployed-engagement-architecture.md §5.1
+apiVersion: kaizen.agentic/v1
+kind: Role
+metadata:
+  id: host-operator
+  version: "0.1.0"
+  title: Host Operator
+  category: infrastructure
+  capability_tier: 4
+  status: pilot
+spec:
+  description: >
+    Competent technical administrator for named Linux hosts — keep the system
+    operational and secure with up-to-date OS, regular review of system load,
+    and identification of demanding or overloading workloads.
+  base_agent: sys-medic
+  agent_definition_template: agent-definition.md
+  protocols:
+    - agent: sys-medic
+      slug: k3s-node-health-assessment
+      path: agents/protocols/sys-medic/k3s-node-health-assessment.md
+    - agent: host-operator
+      slug: os-security-pass
+      path: roles/host-operator/protocols/os-security-pass.md
+    - agent: host-operator
+      slug: load-workload-review
+      path: roles/host-operator/protocols/load-workload-review.md
+  memory_template: memory-template.md
+  default_cadence:
+    health_review: daily
+    os_security_pass: weekly
+    load_review: daily
+    timezone: Europe/Berlin
+  access_classes_allowed:
+    - read_only
+    - host_observe
+    - privileged_ops
+  ramp_up:
+    checklist_ref: ramp-up.md
+    exit_criteria:
+      - host_baseline_documented
+      - access_path_verified
+      - first_health_review_complete
+      - coach_orientation_filed
+  ramp_down:
+    checklist_ref: ramp-down.md
+    exit_criteria:
+      - handoff_pack_written
+      - open_threads_triaged
+      - access_revoked
+      - vault_export_confirmed
+  billing:
+    seat_product: expert_seat_4x
+    duty_weights:
+      standard_review: 1.0
+      deep_assessment: 1.0
+  pilot_targets:
+    - kind: host
+      id: railiance01
+      notes: coulomb k3s production node