* fix(desktop): keep timeout inherit flags when saving plugin connections
* fix(desktop): hide dead query timeout scope from plugin connections
query_timeout_secs only feeds the database query pipeline (dataGrid,
queryStore); plugin connections such as SSH never consume it, so the
generic Advanced-tab radio only suggested a budget the provider cannot
honor. Hide the row for plugin connections while keeping hydration and
submit untouched, and pin the round-trip contract (explicit inherit
flag, preserved scalar) plus the deliberate keep of the connect timeout
radio in the regression spec.
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Co-authored-by: jinpy.he <jinpy.he@kuehne-nagel.com>