Andrey Smirnov 468e318ba4
fix: multiple fixes for dashboard/no data
There were multiple issues:

* `hostname` in the header is coming from resources, and the one in API
  data was unused
* we should update to `n/a` if the value is not available
* if the node is unavailable, the response contains a message with
  placeholders with a proxy error, and that should be honored to ignore
  the response; if instead we use it as it is, it puts zero value, which
  results in funny output.

Fixes #10383

Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
2025-02-25 18:43:18 +04:00
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