Upload app/models/billing_schemas.py with huggingface_hub

app/models/billing_schemas.py

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+"""
+Pydantic schemas for billing endpoints.
+"""
+from pydantic import BaseModel
+from typing import Optional, List
+from datetime import datetime
+
+
+class UsageResponse(BaseModel):
+    """Usage statistics response."""
+    tenant_id: str
+    period: str  # "day" or "month"
+    total_requests: int
+    total_tokens: int
+    total_cost_usd: float
+    gemini_requests: int = 0
+    openai_requests: int = 0
+    start_date: datetime
+    end_date: datetime
+
+
+class PlanLimitsResponse(BaseModel):
+    """Current plan limits response."""
+    tenant_id: str
+    plan_name: str
+    monthly_chat_limit: int  # -1 for unlimited
+    current_month_usage: int
+    remaining_chats: Optional[int]  # None if unlimited
+
+
+class CostReportResponse(BaseModel):
+    """Cost report response."""
+    tenant_id: str
+    period: str
+    total_cost_usd: float
+    total_requests: int
+    total_tokens: int
+    breakdown_by_provider: dict
+    breakdown_by_model: dict
+
+
+class SetPlanRequest(BaseModel):
+    """Request to set tenant plan."""
+    tenant_id: str
+    plan_name: str  # "starter", "growth", or "pro"
+