chore(config): simplify dependabot configuration and disable enhanced services for CPU-only deployment

- Simplify .github/dependabot.yml from 70 to 49 lines
  - Remove beta ecosystems, custom registries, and detailed ignore rules
  - Reduce open PR limits (npm: 10→5, github-actions: 5→3)
  - Remove custom labels and dependency-specific ignore rules
  - Consolidate npm configs from 2 directories to single root directory
  - Remove docker ecosystem configuration

- Add /health endpoint to coordinator

cli/aitbc_cli/utils/__init__.py

@@ -5,7 +5,7 @@ import logging
 import sys
 import os
 from pathlib import Path
-from typing import Any, Optional, Callable, Iterator
+from typing import Tuple, List, Dict, Optional, Any
 from contextlib import contextmanager
 from rich.console import Console
 from rich.logging import RichHandler