style: apply black and isort formatting across entire codebase

- Standardize quote style (single to double quotes)
- Reorder and group imports alphabetically
- Fix line breaks and indentation for consistency
- Apply PEP 8 formatting standards

Also updated Makefile to exclude both venv and .venv from code quality checks.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

models/schema/order.py

@@ -4,23 +4,26 @@ Pydantic schema for order operations.
 """
 
 from datetime import datetime
-from typing import List, Optional
 from decimal import Decimal
-from pydantic import BaseModel, Field, ConfigDict
+from typing import List, Optional
 
+from pydantic import BaseModel, ConfigDict, Field
 
 # ============================================================================
 # Order Item Schemas
 # ============================================================================
 
+
 class OrderItemCreate(BaseModel):
     """Schema for creating an order item."""
+
     product_id: int
     quantity: int = Field(..., ge=1)
 
 
 class OrderItemResponse(BaseModel):
     """Schema for order item response."""
+
     model_config = ConfigDict(from_attributes=True)
 
     id: int
@@ -41,8 +44,10 @@ class OrderItemResponse(BaseModel):
 # Order Address Schemas
 # ============================================================================
 
+
 class OrderAddressCreate(BaseModel):
     """Schema for order address (shipping/billing)."""
+
     first_name: str = Field(..., min_length=1, max_length=100)
     last_name: str = Field(..., min_length=1, max_length=100)
     company: Optional[str] = Field(None, max_length=200)
@@ -55,6 +60,7 @@ class OrderAddressCreate(BaseModel):
 
 class OrderAddressResponse(BaseModel):
     """Schema for order address response."""
+
     model_config = ConfigDict(from_attributes=True)
 
     id: int
@@ -73,8 +79,10 @@ class OrderAddressResponse(BaseModel):
 # Order Create/Update Schemas
 # ============================================================================
 
+
 class OrderCreate(BaseModel):
     """Schema for creating an order."""
+
     customer_id: Optional[int] = None  # Optional for guest checkout
     items: List[OrderItemCreate] = Field(..., min_length=1)
 
@@ -92,9 +100,9 @@ class OrderCreate(BaseModel):
 
 class OrderUpdate(BaseModel):
     """Schema for updating order status."""
+
     status: Optional[str] = Field(
-        None,
-        pattern="^(pending|processing|shipped|delivered|cancelled|refunded)$"
+        None, pattern="^(pending|processing|shipped|delivered|cancelled|refunded)$"
     )
     tracking_number: Optional[str] = None
     internal_notes: Optional[str] = None
@@ -104,8 +112,10 @@ class OrderUpdate(BaseModel):
 # Order Response Schemas
 # ============================================================================
 
+
 class OrderResponse(BaseModel):
     """Schema for order response."""
+
     model_config = ConfigDict(from_attributes=True)
 
     id: int
@@ -141,6 +151,7 @@ class OrderResponse(BaseModel):
 
 class OrderDetailResponse(OrderResponse):
     """Schema for detailed order response with items and addresses."""
+
     items: List[OrderItemResponse]
     shipping_address: OrderAddressResponse
     billing_address: OrderAddressResponse
@@ -148,6 +159,7 @@ class OrderDetailResponse(OrderResponse):
 
 class OrderListResponse(BaseModel):
     """Schema for paginated order list."""
+
     orders: List[OrderResponse]
     total: int
     skip: int