Implement unified story generation flow

backend/app/api/admin_providers.py

@@ -9,8 +9,8 @@ from app.core.admin_auth import admin_guard
 from app.db.admin_models import Provider
 from app.db.database import get_db
 from app.services.adapters.registry import AdapterRegistry
+from app.services.admin_provider_analytics import get_admin_provider_analytics
 from app.services.cost_tracker import cost_tracker
-from app.services.generation_jobs import get_admin_provider_analytics
 from app.services.provider_policy import DEFAULT_PROVIDERS, list_capability_policies
 from app.services.secret_service import SecretService
 
@@ -97,6 +97,8 @@ class ProviderAnalyticsResponse(BaseModel):
     user_count: int
     job_count: int
     story_count: int
+    voice_session_count: int = 0
+    voice_turn_count: int = 0
     by_provider: list[ProviderAnalyticsBucket]
     by_user: list[ProviderAnalyticsUserBucket]
     failure_reasons: list[ProviderAnalyticsFailureReason]