Updating redis and subgraphs configs to be children of preview_entity…

[apollonauttrey]

…_cache

Customer shared that when they were configuring (through trial and error) they discovered that the redis config should be a child of preview_entity_cache - upon making this change, I believe the same is true for the subgraphs config.

Description here

Fixes #issue_number

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Checklist

Complete the checklist (and note appropriate exceptions) before the PR is marked ready-for-review.

• [ ] Changes are compatible[^1]
• [ ] Documentation[^2] completed
• [ ] Performance impact assessed and acceptable
• Tests added and passing[^3]
  • [ ] Unit Tests
  • [ ] Integration Tests
  • [ ] Manual Tests

Exceptions

Note any exceptions here

Notes

[^1]: It may be appropriate to bring upcoming changes to the attention of other (impacted) groups. Please endeavour to do this before seeking PR approval. The mechanism for doing this will vary considerably, so use your judgement as to how and when to do this. [^2]: Configuration is an important part of many changes. Where applicable please try to document configuration examples. [^3]: Tick whichever testing boxes are applicable. If you are adding Manual Tests, please document the manual testing (extensively) in the Exceptions.

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[Geal]

which version of the router are they using? Did you check with the config schema?

[apollonauttrey]

1.50

[apollonauttrey]

i think that's a reasonable compromise @Meschreiber - 1.50 was only late june/early july so it's possible someone else could run into this.

[Geal]

note that this is still a preview feature, so things like configuration could change a bit before GA