chore: fix ruff lint errors, bandit suppressions, and pin pip>=26.0

Remove unused imports (ruff F401), suppress B324 false positives on
spec-mandated MD5 in HASSH/JA3/JA3S fingerprinting, drop unused
record_version assignment in JARM parser, and pin pip>=26.0 in dev
deps to address CVE-2025-8869 and CVE-2026-1703.

decnet/sniffer/worker.py

@@ -14,9 +14,7 @@ import asyncio
 import os
 import subprocess
 import threading
-import time
 from pathlib import Path
-from typing import Any
 
 from decnet.logging import get_logger
 from decnet.network import HOST_MACVLAN_IFACE