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/notifications.py

@@ -9,7 +9,6 @@ Provides endpoints for:
 """
 
 import logging
-from typing import Optional
 
 from fastapi import APIRouter, Depends, Query
 from sqlalchemy.orm import Session
@@ -17,12 +16,13 @@ from sqlalchemy.orm import Session
 from app.api.deps import get_current_admin_api
 from app.core.database import get_db
 from models.database.user import User
-from models.schema.admin import (AdminNotificationCreate,
-                                 AdminNotificationListResponse,
-                                 AdminNotificationResponse,
-                                 PlatformAlertCreate,
-                                 PlatformAlertListResponse,
-                                 PlatformAlertResolve, PlatformAlertResponse)
+from models.schema.admin import (
+    AdminNotificationListResponse,
+    PlatformAlertCreate,
+    PlatformAlertListResponse,
+    PlatformAlertResolve,
+    PlatformAlertResponse,
+)
 
 router = APIRouter(prefix="/notifications")
 logger = logging.getLogger(__name__)
@@ -35,8 +35,8 @@ logger = logging.getLogger(__name__)
 
 @router.get("", response_model=AdminNotificationListResponse)
 def get_notifications(
-    priority: Optional[str] = Query(None, description="Filter by priority"),
-    is_read: Optional[bool] = Query(None, description="Filter by read status"),
+    priority: str | None = Query(None, description="Filter by priority"),
+    is_read: bool | None = Query(None, description="Filter by read status"),
     skip: int = Query(0, ge=0),
     limit: int = Query(50, ge=1, le=100),
     db: Session = Depends(get_db),
@@ -87,8 +87,8 @@ def mark_all_as_read(
 
 @router.get("/alerts", response_model=PlatformAlertListResponse)
 def get_platform_alerts(
-    severity: Optional[str] = Query(None, description="Filter by severity"),
-    is_resolved: Optional[bool] = Query(
+    severity: str | None = Query(None, description="Filter by severity"),
+    is_resolved: bool | None = Query(
         None, description="Filter by resolution status"
     ),
     skip: int = Query(0, ge=0),