feat: default node metrics publishing to on and add docs

Description

As we move towards more decentralization, publishing metrics on the ceramic network becomes more important - so defaulting it to on. Will notify folks in an announcement and post.

How Has This Been Tested?

Describe the tests that you ran to verify your changes. Provide instructions for reproduction.

[x] run locally
[x] unit tests

PR checklist

Before submitting this PR, please make sure:

[x] I have tagged the relevant reviewers and interested parties
[ x] I have updated the READMEs of affected packages
[x] I have made corresponding changes to the documentation

References:

Please list relevant documentation (e.g. tech specs, articles, related work etc.) relevant to this change, and note if the documentation has been updated.

ceramicnetwork / js-ceramic

feat: default node metrics publishing to on and add docs #3244

Description

How Has This Been Tested?

PR checklist

References: