fix(backrest): use Connect-RPC endpoints with Basic Auth

apps/dashboard/backend/app/clients/backrest_client.py

@@ -14,38 +14,43 @@ class BackrestClient(BaseHTTPClient):
     def __init__(self, settings: Settings) -> None:
         super().__init__(settings, "backrest", settings.backrest_base_url)
 
+    def _auth(self) -> tuple[str, str] | None:
+        if self.settings.backrest_username and self.settings.backrest_password:
+            return (self.settings.backrest_username, self.settings.backrest_password)
+        return None
+
     async def fetch_status(self) -> BackrestSnapshot:
         snapshot = BackrestSnapshot()
         if not self.base_url:
             logger.info("backrest skipped: base URL missing")
             return snapshot
 
-        # Backrest uses Connect-RPC: POST /v1.Backrest/{Method}
-        try:
-            data = await self._request_json("POST", "/v1.Backrest/GetConfig", json={})
-        except Exception as exc:
-            logger.warning("backrest fetch_status GetConfig failed: %s", exc)
-            return snapshot
+        auth = self._auth()
 
+        # Get config (repo list) via Connect-RPC
+        data = await self._request_json(
+            "POST", "/v1.Backrest/GetConfig",
+            json={},
+            auth=auth,
+        )
         if not isinstance(data, dict):
             return snapshot
 
         repos = data.get("repos") or []
         repo_count = len(repos) if isinstance(repos, list) else 0
 
-        # Fetch recent operations for backup status
+        # Get recent operations via Connect-RPC
         last_backup_age_hours: float | None = None
         error_count = 0
         last_backup_status = "unknown"
 
-        try:
-            ops_data = await self._request_json(
-                "POST",
-                "/v1.Backrest/GetOperations",
-                json={"lastN": 20},
-            )
-            ops = ops_data.get("operations") or [] if isinstance(ops_data, dict) else []
-            # backupOp is a oneof field serialised directly at the operation level in proto3 JSON
+        ops_data = await self._request_json(
+            "POST", "/v1.Backrest/GetOperations",
+            json={"lastN": 20},
+            auth=auth,
+        )
+        if isinstance(ops_data, dict):
+            ops = ops_data.get("operations") or []
             backup_ops = [
                 op for op in ops
                 if isinstance(op, dict) and op.get("backupOp") is not None
@@ -61,13 +66,12 @@ class BackrestClient(BaseHTTPClient):
                     now = datetime.now(timezone.utc)
                     last_backup_age_hours = round((now - ended).total_seconds() / 3600, 1)
                 status_str = latest.get("status", "")
-                last_backup_status = (
-                    "ok" if status_str == "STATUS_SUCCESS"
-                    else "error" if status_str == "STATUS_ERROR"
-                    else "unknown"
-                )
-        except Exception as exc:
-            logger.warning("backrest fetch_status GetOperations failed: %s", exc)
+                if status_str == "STATUS_SUCCESS":
+                    last_backup_status = "ok"
+                elif status_str == "STATUS_ERROR":
+                    last_backup_status = "error"
+                else:
+                    last_backup_status = "unknown"
 
         return BackrestSnapshot(
             source_status="online",