change display of enum types within explorer and insights

[n1ru4l]

In the explorer for enum members we show always the same number. That is because we are always reporting all enum values for a selection of a enum type field within a GraphQL operation.

In order to not confuse people we should show this metric once in the enum type header instead.

Tracking the enums value more accurate is another complex discussion, we cannot really track it consistently without inspecting execution results and execution variables.

The same is true for enum insights:

Instead, we should change the header here to EnumName (EnumName.enumField). That will also make it more clear that these metrics are actually for the the enum type and not the enum field.