fix: what bandit and the remaining lint rules found

- The MD5 of the password is what the phone's login API expects, the wire
  format and no protection of ours (the session runs over HTTPS):
  hashlib.md5(..., usedforsecurity=False) (B324). The digest is the same.
- A failed logout in close() and an unreadable system info in get_facts()
  now log at debug level (B110), so a swallowed failure leaves a trace; the
  module gets its logger.
- The comment on the "yealink" fingerprint rule moves above it (ruff
  format had split the line around it) and is in English.

napalm_yealink/yealink.py

@@ -14,6 +14,7 @@ automatically) or via ``optional_args={"verify_ssl": False}``.
 from __future__ import annotations
 
 import hashlib
+import logging
 import socket
 from typing import Any
 
@@ -22,6 +23,8 @@ from napalm.base.exceptions import ConnectionException
 from napalm_device_types import FingerprintRule, PhoneDriver
 from requests.exceptions import RequestException
 
+logger = logging.getLogger(__name__)
+
 
 class YealinkDriver(PhoneDriver):
     """NAPALM driver for Yealink IP phones (T-series, W-series, CP-series, VP-series)."""
@@ -35,9 +38,8 @@ class YealinkDriver(PhoneDriver):
         "80:5E:0C",  # YEALINK(XIAMEN) NETWORK TECHNOLOGY — IEEE, verifiziert an T58V
     ]
     HTTP_FINGERPRINT = [
-        FingerprintRule(
-            "yealink", weight=10.0
-        ),  # nicht mandatory: Yealink/api redirect hat kein "yealink" im Body
+        # Not mandatory: the redirect of some models to their API page has no "yealink" in it.
+        FingerprintRule("yealink", weight=10.0),
         FingerprintRule("sip-t", weight=5.0),
         FingerprintRule("sip-w", weight=5.0),
         FingerprintRule("sip-cp", weight=5.0),
@@ -70,7 +72,9 @@ class YealinkDriver(PhoneDriver):
     def open(self) -> None:
         self._session = requests.Session()
         self._session.verify = self._verify_ssl
-        pw_hash = hashlib.md5(self.password.encode()).hexdigest()
+        # The login API takes the password as an MD5 hex digest: the wire format, not a
+        # protection (the session runs over HTTPS).
+        pw_hash = hashlib.md5(self.password.encode(), usedforsecurity=False).hexdigest()
         try:
             resp = self._session.post(
                 f"{self._base_url}{self._LOGIN_PATH}",
@@ -92,7 +96,7 @@ class YealinkDriver(PhoneDriver):
                     timeout=5,
                 )
             except Exception:
-                pass
+                logger.debug("Logging out of the phone failed: ignored", exc_info=True)
             self._session.close()
             self._session = None
 
@@ -123,7 +127,7 @@ class YealinkDriver(PhoneDriver):
             payload = data.get("data") or data.get("error") or {}
             info = payload if isinstance(payload, dict) else {}
         except Exception:
-            pass
+            logger.debug("Reading the system info failed: ignored", exc_info=True)
 
         model = info.get("phoneName") or info.get("model") or "Yealink"
         firmware = info.get("firmware") or info.get("firmwareVersion") or ""