refactor: modernize code quality tooling with Ruff

- Replace black, isort, and flake8 with Ruff (all-in-one linter and formatter)
- Add comprehensive pyproject.toml configuration
- Simplify Makefile code quality targets
- Configure exclusions for venv/.venv in pyproject.toml
- Auto-fix 1,359 linting issues across codebase

Benefits:
- Much faster builds (Ruff is written in Rust)
- Single tool replaces multiple tools
- More comprehensive rule set (UP, B, C4, SIM, PIE, RET, Q)
- All configuration centralized in pyproject.toml
- Better import sorting and formatting consistency

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

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

app/api/v1/shop/orders.py

@@ -8,7 +8,6 @@ Requires customer authentication for most operations.
 """
 
 import logging
-from typing import Optional
 
 from fastapi import APIRouter, Depends, HTTPException, Path, Query, Request
 from sqlalchemy.orm import Session
@@ -19,8 +18,12 @@ from app.services.customer_service import customer_service
 from app.services.order_service import order_service
 from models.database.customer import Customer
 from models.database.user import User
-from models.schema.order import (OrderCreate, OrderDetailResponse,
-                                 OrderListResponse, OrderResponse)
+from models.schema.order import (
+    OrderCreate,
+    OrderDetailResponse,
+    OrderListResponse,
+    OrderResponse,
+)
 
 router = APIRouter()
 logger = logging.getLogger(__name__)