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/customer.py

@@ -5,35 +5,34 @@ Pydantic schema for customer-related operations.
 
 from datetime import datetime
 from decimal import Decimal
-from typing import Optional, Dict, Any, List
-from pydantic import BaseModel, EmailStr, Field, field_validator
+from typing import Any, Dict, List, Optional
 
+from pydantic import BaseModel, EmailStr, Field, field_validator
 
 # ============================================================================
 # Customer Registration & Authentication
 # ============================================================================
 
+
 class CustomerRegister(BaseModel):
     """Schema for customer registration."""
 
     email: EmailStr = Field(..., description="Customer email address")
     password: str = Field(
-        ...,
-        min_length=8,
-        description="Password (minimum 8 characters)"
+        ..., min_length=8, description="Password (minimum 8 characters)"
     )
     first_name: str = Field(..., min_length=1, max_length=100)
     last_name: str = Field(..., min_length=1, max_length=100)
     phone: Optional[str] = Field(None, max_length=50)
     marketing_consent: bool = Field(default=False)
 
-    @field_validator('email')
+    @field_validator("email")
     @classmethod
     def email_lowercase(cls, v: str) -> str:
         """Convert email to lowercase."""
         return v.lower()
 
-    @field_validator('password')
+    @field_validator("password")
     @classmethod
     def password_strength(cls, v: str) -> str:
         """Validate password strength."""
@@ -55,7 +54,7 @@ class CustomerUpdate(BaseModel):
     phone: Optional[str] = Field(None, max_length=50)
     marketing_consent: Optional[bool] = None
 
-    @field_validator('email')
+    @field_validator("email")
     @classmethod
     def email_lowercase(cls, v: Optional[str]) -> Optional[str]:
         """Convert email to lowercase."""
@@ -66,6 +65,7 @@ class CustomerUpdate(BaseModel):
 # Customer Response
 # ============================================================================
 
+
 class CustomerResponse(BaseModel):
     """Schema for customer response (excludes password)."""
 
@@ -84,9 +84,7 @@ class CustomerResponse(BaseModel):
     created_at: datetime
     updated_at: datetime
 
-    model_config = {
-        "from_attributes": True
-    }
+    model_config = {"from_attributes": True}
 
     @property
     def full_name(self) -> str:
@@ -110,6 +108,7 @@ class CustomerListResponse(BaseModel):
 # Customer Address
 # ============================================================================
 
+
 class CustomerAddressCreate(BaseModel):
     """Schema for creating customer address."""
 
@@ -159,14 +158,14 @@ class CustomerAddressResponse(BaseModel):
     created_at: datetime
     updated_at: datetime
 
-    model_config = {
-        "from_attributes": True
-    }
+    model_config = {"from_attributes": True}
+
 
 # ============================================================================
 # Customer Preferences
 # ============================================================================
 
+
 class CustomerPreferencesUpdate(BaseModel):
     """Schema for updating customer preferences."""