Add new fields for tax and depreciation in receipt processing

- Introduced fields: receipt_location, calculated_tax, is_depreciable, cca_rate, useful_life, and residual_value in DBReceipt model.
- Updated process_document function to handle new receipt data attributes.
- Enhanced DocumentProcessResponse schema to include new fields.
- Updated document processing rules to incorporate tax calculation based on location and depreciation rules.

app/schemas.py

@@ -173,6 +173,20 @@ class DocumentProcessResponse(BaseModel):
     confidence: Optional[float] = None
     error: Optional[str] = None
     receipt_currency: Optional[str] = "CAD"
+    receipt_location: Optional[str] = (
+        None  # Location from receipt (e.g., "Ontario, Canada" or "California, USA")
+    )
+    calculated_tax: Optional[float] = None  # Calculated sales tax if not clearly shown
+    is_depreciable: Optional[bool] = None  # Whether item is a depreciable asset
+    cca_rate: Optional[float] = (
+        None  # CCA rate for tax depreciation (e.g., 0.30 for 30%)
+    )
+    useful_life: Optional[int] = (
+        None  # Useful life in years for straight-line depreciation
+    )
+    residual_value: Optional[float] = (
+        None  # Residual value for straight-line depreciation
+    )
 
 
 # New tax-related models