Add prefect-couchbase as an official integration (src/integrations/prefect-couchbase)

[shyam-cb]

I'd like to propose adding prefect-couchbase as an official Prefect integration under src/integrations/prefect-couchbase. It provides a Prefect credentials block and a small connector around the official Couchbase Python SDK, so flows can store Couchbase connection details as a block and run common operations (upsert, get, remove, SQL++ query, ping) without hand-rolling SDK setup in every flow.

Right now there's no first-party way to connect Prefect to Couchbase (or Capella), so users manage credentials and connections manually. This would give them the same block-based, load-by-name experience as integrations like prefect-snowflake and prefect-redis.

It's already built and working: password and certificate auth, context-managed connection lifecycle, unit + live integration tests at 100% coverage, plus docs and runnable examples. Current repo: https://github.com/couchbase-ecosystem/couchbase-prefect

Would you accept this into src/integrations, and is there anything you'd want changed before I open a PR?

[desertaxle]

Hey @shyam-cb! Usually, integrations start as community-maintained, with the option to move them into the PrefectHQ/prefect repo if there is strong adoption and the creator would prefer the core Prefect team take over maintenance. I think a good first step is to submit a PR to Prefect's integration catalog to include prefect-couchbase. We'll review the library as part of that PR and suggest enhancements to make the library more useful to Prefect and Couchbase users. I can't view the repo that you linked, but normally we'd want to see an integration library include more than a credentials block and a thin adapter to another Python library.

[shyam-cb]

@desertaxle I have made the repo public.

[shyam-cb]

@desertaxle also if possible can we publish the integration and open a PR for the docs to include information about the Couchbase integration?