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/database.py

@@ -88,3 +88,9 @@ class DBReceipt(Base):
     extraction_success = Column(String, nullable=True)
     error_message = Column(String, nullable=True)
     receipt_currency = Column(String, nullable=True)
+    receipt_location = Column(String, nullable=True)
+    calculated_tax = Column(Float, nullable=True)
+    is_depreciable = Column(String, nullable=True)  # Store as string "True"/"False"
+    cca_rate = Column(Float, nullable=True)
+    useful_life = Column(Integer, nullable=True)
+    residual_value = Column(Float, nullable=True)