CBG-5213 implement private API for rosmar bucket deletion

[torcolvin]

CBG-5213 implement private API for rosmar bucket deletion

The purpose is to support running couchbase-lite-tests e2e tests, which reuse bucket names between test runs and there is no ability to clear out buckets. This code is hidden behind unsupported API flag.

Written with gemini code assist and tested with a small change couchbase-lite-tests - all e2e tests pass. The only API that is actually used is DELETE /_rosmar/bucketname but I added ability to list buckets/collections. I'm neutral/negative on the API support to delete a scope or collection in rosmar. This is not needed for couchbase-lite-tests so I can remove this if it's complicated. It's a keyspace of bucket.scope.collection in the way that Couchbase Server uses the term keyspace but not in the way that Sync Gateway does of database.scope.collection

In rosmar, scopes are implicitly if a collection exists, and collections are created on the fly if they don't exist, so there is no need to manually create one.

Pre-review checklist

• Removed debug logging (fmt.Print, log.Print, ...)
• Logging sensitive data? Make sure it's tagged (e.g. base.UD(docID), base.MD(dbName))
• Updated relevant information in the API specifications (such as endpoint descriptions, schemas, ...) in docs/api

[github-actions]

Redocly previews

• Admin API
• Public API
• Metric API
• Diagnostic API

[Copilot]

Pull request overview

Implements an unsupported (private) admin REST API to manage Rosmar buckets to support e2e tests that reuse bucket names across runs.

Changes:

• Adds gated admin endpoints to list Rosmar buckets/scopes/collections and delete a bucket/scope/collection.
• Introduces handler implementation plus unit tests for the new Rosmar management API.
• Extends unsupported startup config and updates OpenAPI documentation for the new endpoints.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
rest/routing.go	Wires new _rosmar admin routes behind an unsupported config flag.
rest/rosmar_api.go	Implements GET listing and DELETE deletion logic for Rosmar bucket keyspaces.
rest/rosmar_api_test.go	Adds tests covering list and delete behaviors for bucket/scope/collection.
rest/config_startup.go	Adds unsupported config toggle rosmar_bucket_management.
docs/api/paths/admin/_rosmar.yaml	Documents the GET listing endpoint.
docs/api/paths/admin/_rosmar-bucketkeyspace.yaml	Documents the DELETE endpoint semantics.
docs/api/admin.yaml	Registers the new OpenAPI paths under the admin spec.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.