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/admin/audit.py

@@ -10,7 +10,6 @@ Provides endpoints for:
 
 import logging
 from datetime import datetime
-from typing import Optional
 
 from fastapi import APIRouter, Depends, Query
 from sqlalchemy.orm import Session
@@ -19,9 +18,11 @@ from app.api.deps import get_current_admin_api
 from app.core.database import get_db
 from app.services.admin_audit_service import admin_audit_service
 from models.database.user import User
-from models.schema.admin import (AdminAuditLogFilters,
-                                 AdminAuditLogListResponse,
-                                 AdminAuditLogResponse)
+from models.schema.admin import (
+    AdminAuditLogFilters,
+    AdminAuditLogListResponse,
+    AdminAuditLogResponse,
+)
 
 router = APIRouter(prefix="/audit")
 logger = logging.getLogger(__name__)
@@ -29,11 +30,11 @@ logger = logging.getLogger(__name__)
 
 @router.get("/logs", response_model=AdminAuditLogListResponse)
 def get_audit_logs(
-    admin_user_id: Optional[int] = Query(None, description="Filter by admin user"),
-    action: Optional[str] = Query(None, description="Filter by action type"),
-    target_type: Optional[str] = Query(None, description="Filter by target type"),
-    date_from: Optional[datetime] = Query(None, description="Filter from date"),
-    date_to: Optional[datetime] = Query(None, description="Filter to date"),
+    admin_user_id: int | None = Query(None, description="Filter by admin user"),
+    action: str | None = Query(None, description="Filter by action type"),
+    target_type: str | None = Query(None, description="Filter by target type"),
+    date_from: datetime | None = Query(None, description="Filter from date"),
+    date_to: datetime | None = Query(None, description="Filter to date"),
     skip: int = Query(0, ge=0, description="Number of records to skip"),
     limit: int = Query(100, ge=1, le=1000, description="Maximum records to return"),
     db: Session = Depends(get_db),