fix: add missing stdlib imports (threading, os, re, csv, io, datetime) across route modules

routes/collection.py

@@ -21,6 +21,7 @@ import json
 import os
 import re
 import sqlite3
+import threading
 import time
 from datetime import datetime, timezone
 from pathlib import Path

routes/deckgen.py

@@ -19,10 +19,13 @@ Deck generation endpoints (classic, Perplexity V1, V3):
 """
 from __future__ import annotations
 
+import csv
+import io
 import json
 import os
 import re
 import time
+from datetime import datetime
 from pathlib import Path
 from typing import Optional
 from urllib.request import urlopen, Request

routes/lab.py

@@ -20,6 +20,7 @@ from __future__ import annotations
 import glob
 import json
 import os
+import re
 import threading
 import uuid
 from datetime import datetime

routes/scanner.py

@@ -13,6 +13,7 @@ from __future__ import annotations
 
 import json
 import os
+import re
 import time
 from pathlib import Path
 from urllib.request import urlopen, Request