fix: resolve ruff import ordering and unused import errors

Fixes 4 linting errors that were failing CI:
- Remove unused `shutil` import from bin/import_artemis.py
- Sort/format import blocks in routes/signalid.py and
  tests/test_signalid_match_route.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bin/import_artemis.py

@@ -25,7 +25,6 @@ import argparse
 import json
 import os
 import re
-import shutil
 import sqlite3
 import subprocess
 import sys

routes/signalid.py

@@ -8,9 +8,9 @@ import urllib.parse
 import urllib.request
 from typing import Any
 
-import config
 from flask import Blueprint, Response, jsonify, request
 
+import config
 from utils.logging import get_logger
 from utils.responses import api_error
 from utils.signal_db import match_signals

tests/test_signalid_match_route.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import json
+
 import pytest
 
 
@@ -10,6 +11,7 @@ import pytest
 def client():
     """Minimal Flask test client with only the signalid blueprint registered."""
     from flask import Flask
+
     from routes.signalid import signalid_bp
 
     app = Flask(__name__)