[MATRIX-1310] add cosmosdb connection

[xli1996]

Release Notes

New Features

• Add "cosmosdb" connection type support for confluent flink connection

Checklist

• I have successfully built and used a custom CLI binary, without linter issues from this PR.
• I have clearly specified in the What section below whether this PR applies to Confluent Cloud, Confluent Platform, or both.
• I have verified this PR in Confluent Cloud pre-prod or production environment, if applicable.
• I have verified this PR in Confluent Platform on-premises environment, if applicable.
• I have attached manual CLI verification results or screenshots in the Test & Review section below.
• I have added appropriate CLI integration or unit tests for any new or updated commands and functionality.
• I confirm that this PR introduces no breaking changes or backward compatibility issues.
• I have indicated the potential customer impact if something goes wrong in the Blast Radius section below.
• I have put checkmarks below confirming that the feature associated with this PR is enabled in:
  • Confluent Cloud prod
  • Confluent Cloud stag
  • Confluent Platform
  • Check this box if the feature is enabled for certain organizations only

What

Add new flink cosmosdb connection, this pr applies to CC.

Blast Radius

this should only affect new cosmosdb type connection

References

Test & Review

[confluent-cla-assistant]

🎉 All Contributor License Agreements have been signed. Ready to merge.
_{Please push an empty commit if you would like to re-run the checks to verify CLA status for all contributors.}

[sonarqube-confluent]

Quality Gate passed

Issues
1 New issue
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube

[Copilot]

Pull request overview

This PR adds support for a new Flink connection type, cosmosdb, in the CLI and updates associated tests and help text. It ensures the new type is wired into connection type validation, secret handling, and command help output.

Changes:

• Extend core Flink connection utilities to recognize cosmosdb and associate it with api-key secrets.
• Add and update CLI tests and golden files (create, list, update, and error/help outputs) to cover the cosmosdb connection type.
• Update the linting vocabulary to allow the new cosmosdb identifier.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/flink_test.go	Adds a successful Flink connection create test case for the new cosmosdb type.
test/fixtures/output/flink/connection/update-help.golden	Updates update-help output to include cosmosdb in the list of types using --api-key.
test/fixtures/output/flink/connection/list/list-failure.golden	Extends invalid-type suggestion output to mention cosmosdb.
test/fixtures/output/flink/connection/list-help.golden	Updates list-help output to include cosmosdb in the --type flag description.
test/fixtures/output/flink/connection/create/create-wrong-type.golden	Extends wrong-type suggestion output to mention cosmosdb.
test/fixtures/output/flink/connection/create/create-rest-mutually-exclusive-secret.golden	Updates create-help output for REST mutual exclusivity to include cosmosdb in type and --api-key descriptions.
test/fixtures/output/flink/connection/create/create-rest-missing-required-secret.golden	Updates missing-secret create-help output to include cosmosdb where relevant.
test/fixtures/output/flink/connection/create/create-missing-required-secret.golden	Adds cosmosdb to the type and --api-key descriptions in missing-secret messaging.
test/fixtures/output/flink/connection/create/create-mcp_server-mutually-exclusive-secret.golden	Adjusts mcp_server mutual-exclusive-secret help to include cosmosdb in shared lists.
test/fixtures/output/flink/connection/create/create-mcp_server-missing-required-secret.golden	Updates mcp_server missing-secret help text to mention cosmosdb.
test/fixtures/output/flink/connection/create/create-cosmosdb.golden	Adds golden output for a successful cosmosdb Flink connection creation.
test/fixtures/output/flink/connection/create/create-a2a-mutually-exclusive-secret.golden	Extends a2a mutual-exclusive-secret help output to include cosmosdb in shared lists.
test/fixtures/output/flink/connection/create/create-a2a-missing-required-secret.golden	Updates a2a missing-secret help text to reference cosmosdb.
test/fixtures/output/flink/connection/create-help.golden	Updates generic create-help output to include cosmosdb in type and --api-key descriptions.
pkg/flink/utils.go	Registers cosmosdb in connection types and secret mappings, including required api-key.
cmd/lint/main.go	Adds cosmosdb to the linter vocabulary list to avoid false-positive spelling issues.

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