docs: restore six legacy customization redirects - #288

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Fetched 6 OpenApi file(s):
  - cloud/openapi/v2.json
  - cloud/openapi/v3.json
  - cloud/openapi/v4.json
  - openapi/v2.json
  - openapi/v3.json
  - openapi/v4.json
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Skipped AsyncAPI navigation generation
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Persisted 120 generated API page(s)
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Successfully updated API reference metadata.
Updating all paths...
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Updating navigation...
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