feat(control-plane): harden host-scoped reconcile and acceptance evidence

- add batch-scoped reconcile_runs persistence and queries
- route batch detail and reconcile writes through batch_id/host_id
- refresh production boards with host-scope acceptance artifacts
- include latest real-host acceptance evidence for self_service and subscription

internal/host/sub2api/client.go

@@ -42,8 +42,10 @@ type HostCapabilities struct {
 }
 
 type CreateGroupRequest struct {
-	Name           string  `json:"name"`
-	RateMultiplier float64 `json:"rate_multiplier"`
+	Name             string  `json:"name"`
+	Platform         string  `json:"platform,omitempty"`
+	RateMultiplier   float64 `json:"rate_multiplier"`
+	SubscriptionType string  `json:"subscription_type,omitempty"`
 }
 
 type GroupRef struct {
@@ -108,7 +110,7 @@ type AccountModel struct {
 type AssignSubscriptionRequest struct {
 	UserID       string `json:"user_id"`
 	GroupID      string `json:"group_id"`
-	DurationDays int    `json:"duration_days,omitempty"`
+	DurationDays int    `json:"validity_days,omitempty"`
 }
 
 type SubscriptionRef struct {