DOC-5158 - break cdc into multiple partials (streaming)

[aimurphy]

Break the CDC partial into multiple smaller partials by heading.

• Common: https://github.com/riptano/docs-common/pull/32
• Serverless: https://github.com/riptano/astra-vector-docs/pull/955
• Streaming: DOC-5158 - break cdc into multiple partials (streaming) #131

[plpesvc-ds]

Build successful! ✅
Pull requests with matching branch name doc-5158 included in the build:

• DOC-5158 - break cdc into multiple partials (streaming) #131 (this pull request)
• https://github.com/riptano/docs-common/pull/32
• https://github.com/riptano/astra-vector-docs/pull/955

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[rh-datastax]

LGTM