fix: what bandit and the remaining lint rules found

- The six except Exception: pass (REST logout, the extra-ports lookup, the
  per-port detail in get_interfaces, closing CLI and REST sessions) now log
  at debug level (B110), so a swallowed failure leaves a trace.
- nosec for comparing a reported address with 0.0.0.0 (B104) and for the
  empty password field of get_users (B105, now a named constant); both are
  false positives.
- A long error message is split into adjacent f-strings; the unused ARP
  entry type is named _entry_type.
- tests: the failed-open test expects ConnectionException instead of any
  Exception; raise ... from exc.

tests/unit/test_ssh_host_key.py

@@ -43,7 +43,7 @@ def _refuse(**kwargs):
     try:
         raise paramiko.BadHostKeyException("10.0.0.4", SERVER_KEY, OTHER_KEY)
     except paramiko.SSHException as exc:
-        raise NetmikoTimeoutException(f"A paramiko SSHException occurred: {exc}")
+        raise NetmikoTimeoutException(f"A paramiko SSHException occurred: {exc}") from exc
 
 
 def _driver(seen: list, known: dict | None = None, **extra) -> ProcurveDriver: