feat: track NH broadband install lifecycle (#533)

docs/nh-broadband-install-request.example.yaml

@@ -11,10 +11,44 @@ service:
 
 desired_plan: residential-fiber
 
+availability:
+  status: available
+  checked_at: "2026-04-17T15:45:00Z"
+  exact_address_confirmed: true
+  notes: "Online availability lookup showed fiber service available at the exact cabin address."
+
+pricing:
+  recommended_plan: 1Gbps fiber
+  monthly_cost_usd: 79.95
+  install_fee_usd: 99.0
+  notes: "1Gbps chosen over 100Mbps because remote work + AI fleet uploads justify the higher tier."
+
+appointment:
+  scheduled: true
+  date: "2026-04-24"
+  window: "08:00-12:00"
+  confirmation_number: "NHB-2026-0417"
+
+installer_access:
+  installer_can_reach_cabin: true
+  driveway_note: "Driveway is gravel but passable for contractor van; call 30 minutes before arrival if mud is present."
+  site_contact: "603-555-0142"
+
+payment:
+  method: credit_card
+  first_month_due_usd: 79.95
+  install_fee_due_usd: 99.0
+  notes: "Card on file approved for first month plus install fee."
+
 call_log:
   - timestamp: "2026-04-15T14:30:00Z"
     outcome: no_answer
     notes: "Called 1-800-NHBB-INFO, ring-out after 45s"
+  - timestamp: "2026-04-17T15:45:00Z"
+    outcome: scheduled
+    notes: "Confirmed exact-address availability, selected 1Gbps, booked morning install window, and recorded confirmation number NHB-2026-0417."
+
+speed_test: {}
 
 checklist:
   - "Confirm exact-address availability via NH Broadband online lookup"