fixes

api/models/FinancialUsageDTO.py

@@ -0,0 +1,18 @@
+from pydantic import BaseModel
+from typing import List, Optional
+
+class UsageStats(BaseModel):
+    total_runs: int
+    total_tokens: int
+    total_input_tokens: int
+    total_output_tokens: int
+    total_cost: float
+
+class UsageByEntity(BaseModel):
+    entity_id: Optional[str] = None
+    stats: UsageStats
+
+class FinancialReport(BaseModel):
+    summary: UsageStats
+    by_user: Optional[List[UsageByEntity]] = None
+    by_project: Optional[List[UsageByEntity]] = None