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>

app/services/product_service.py

@@ -14,14 +14,11 @@ from typing import List, Optional, Tuple
 
 from sqlalchemy.orm import Session
 
-from app.exceptions import (
-    ProductNotFoundException,
-    ProductAlreadyExistsException,
-    ValidationException,
-)
-from models.schema.product import ProductCreate, ProductUpdate
-from models.database.product import Product
+from app.exceptions import (ProductAlreadyExistsException,
+                            ProductNotFoundException, ValidationException)
 from models.database.marketplace_product import MarketplaceProduct
+from models.database.product import Product
+from models.schema.product import ProductCreate, ProductUpdate
 
 logger = logging.getLogger(__name__)
 
@@ -45,10 +42,11 @@ class ProductService:
             ProductNotFoundException: If product not found
         """
         try:
-            product = db.query(Product).filter(
-                Product.id == product_id,
-                Product.vendor_id == vendor_id
-            ).first()
+            product = (
+                db.query(Product)
+                .filter(Product.id == product_id, Product.vendor_id == vendor_id)
+                .first()
+            )
 
             if not product:
                 raise ProductNotFoundException(f"Product {product_id} not found")
@@ -62,7 +60,7 @@ class ProductService:
             raise ValidationException("Failed to retrieve product")
 
     def create_product(
-            self, db: Session, vendor_id: int, product_data: ProductCreate
+        self, db: Session, vendor_id: int, product_data: ProductCreate
     ) -> Product:
         """
         Add a product from marketplace to vendor catalog.
@@ -81,10 +79,14 @@ class ProductService:
         """
         try:
             # Verify marketplace product exists and belongs to vendor
-            marketplace_product = db.query(MarketplaceProduct).filter(
-                MarketplaceProduct.id == product_data.marketplace_product_id,
-                MarketplaceProduct.vendor_id == vendor_id
-            ).first()
+            marketplace_product = (
+                db.query(MarketplaceProduct)
+                .filter(
+                    MarketplaceProduct.id == product_data.marketplace_product_id,
+                    MarketplaceProduct.vendor_id == vendor_id,
+                )
+                .first()
+            )
 
             if not marketplace_product:
                 raise ValidationException(
@@ -92,10 +94,15 @@ class ProductService:
                 )
 
             # Check if already in catalog
-            existing = db.query(Product).filter(
-                Product.vendor_id == vendor_id,
-                Product.marketplace_product_id == product_data.marketplace_product_id
-            ).first()
+            existing = (
+                db.query(Product)
+                .filter(
+                    Product.vendor_id == vendor_id,
+                    Product.marketplace_product_id
+                    == product_data.marketplace_product_id,
+                )
+                .first()
+            )
 
             if existing:
                 raise ProductAlreadyExistsException(
@@ -122,9 +129,7 @@ class ProductService:
             db.commit()
             db.refresh(product)
 
-            logger.info(
-                f"Added product {product.id} to vendor {vendor_id} catalog"
-            )
+            logger.info(f"Added product {product.id} to vendor {vendor_id} catalog")
             return product
 
         except (ProductAlreadyExistsException, ValidationException):
@@ -136,7 +141,11 @@ class ProductService:
             raise ValidationException("Failed to create product")
 
     def update_product(
-            self, db: Session, vendor_id: int, product_id: int, product_update: ProductUpdate
+        self,
+        db: Session,
+        vendor_id: int,
+        product_id: int,
+        product_update: ProductUpdate,
     ) -> Product:
         """
         Update product in vendor catalog.
@@ -202,13 +211,13 @@ class ProductService:
             raise ValidationException("Failed to delete product")
 
     def get_vendor_products(
-            self,
-            db: Session,
-            vendor_id: int,
-            skip: int = 0,
-            limit: int = 100,
-            is_active: Optional[bool] = None,
-            is_featured: Optional[bool] = None,
+        self,
+        db: Session,
+        vendor_id: int,
+        skip: int = 0,
+        limit: int = 100,
+        is_active: Optional[bool] = None,
+        is_featured: Optional[bool] = None,
     ) -> Tuple[List[Product], int]:
         """
         Get products in vendor catalog with filtering.