[PYF-260] Add flink statement result list command and display results on create --wait

[Zander Matheson (awmatheson)]

Release Notes

• Add new confluent flink statement result list <statement-name> command that fetches and displays SQL statement result rows from the Flink Gateway API, with support for --output human/json/yaml,
  --wait, and --max-rows flags

  • Enhance confluent flink statement create --wait to automatically fetch and display results when the statement produces them (has a result schema), falling through to existing metadata output for
    DDL
    statements
  • Cloud-only for now; on-prem (CMF) support can follow in a separate change

  Test plan

  • go build ./... compiles successfully
  • New TestFlinkStatementResultList integration tests pass (human, JSON, YAML output formats)
  • Existing TestFlinkStatementCreate tests pass (including --wait)
  • Existing TestFlinkStatement tests pass
  • Golden fixture files created for all output formats and help text
  • Manual test with live compute pool: confluent flink statement create --sql "SHOW DATABASES" --wait --compute-pool <pool>
  • Manual test: confluent flink statement result list <statement-name> --cloud <cloud> --region <region>

  Jira: https://confluentinc.atlassian.net/browse/PYF-260"

Breaking Changes

• PLACEHOLDER

New Features

• PLACEHOLDER

Bug Fixes

• PLACEHOLDER

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

Blast Radius

References

Test & Review

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