v1.9.40: Grafana basic auth support (user/password + api_token)

- Add user/password fields to Grafana in server dialog FIELD_MAP
- GrafanaClient: support basic auth when no api_token is set
- ssh.py: _grafana_request supports basic auth fallback

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

core/grafana_client.py

@@ -20,19 +20,25 @@ class GrafanaClient:
         Initialize the Grafana client.
 
         Args:
-            server: dict with keys: ip, port, api_token, use_ssl
+            server: dict with keys: ip, port, api_token (or user+password), use_ssl
         """
         self.ip: str = server["ip"]
         self.port: int = int(server["port"])
-        self.api_token: str = server["api_token"]
+        self.api_token: str = server.get("api_token", "")
+        self.user: str = server.get("user", "")
+        self.password: str = server.get("password", "")
         self.use_ssl: bool = bool(server.get("use_ssl", False))
 
         scheme = "https" if self.use_ssl else "http"
         self.base_url: str = f"{scheme}://{self.ip}:{self.port}"
-        self.headers: dict[str, str] = {
-            "Authorization": f"Bearer {self.api_token}",
-            "Content-Type": "application/json",
-        }
+        self.headers: dict[str, str] = {"Content-Type": "application/json"}
+        self.auth: tuple[str, str] | None = None
+
+        if self.api_token:
+            self.headers["Authorization"] = f"Bearer {self.api_token}"
+        elif self.user and self.password:
+            self.auth = (self.user, self.password)
+
         self.timeout: int = 10
 
     def _get(self, path: str, params: dict | None = None) -> Any:
@@ -42,7 +48,7 @@ class GrafanaClient:
         url = f"{self.base_url}{path}"
         log.debug("Grafana GET %s", url)
         resp = requests.get(
-            url, headers=self.headers, params=params, timeout=self.timeout
+            url, headers=self.headers, params=params, auth=self.auth, timeout=self.timeout
         )
         resp.raise_for_status()
         return resp.json()
@@ -54,7 +60,7 @@ class GrafanaClient:
         url = f"{self.base_url}{path}"
         log.debug("Grafana POST %s", url)
         resp = requests.post(
-            url, headers=self.headers, json=json_data, timeout=self.timeout
+            url, headers=self.headers, json=json_data, auth=self.auth, timeout=self.timeout
         )
         resp.raise_for_status()
         return resp.json()