Allow viewing mocked ENSAdmin pages without active connection.

[tk-o]

Right now, to view /mocks for ENSAdmin, there the active ENSNode connection must be valid. But sometimes, due to breaking changes on data model, we cannot see the mocked pages in ENSAdmin:

This issue addresses the feedback point raised here:
#1988 (comment)

[coderabbitai]

🔗 Related PRs

#1711 - Fix writes through ENSDb Client [merged]

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