workflow-service@v0.6.508-dev-4def82ca3: test(workflow): add integration tests for workflow controller (#2888)

* test(workflow): add integration tests for workflow controller

- Create integration tests for the external workflow controller
- Validate authentication and input parameters in various scenarios

(your test suite is so long, I half expect it to come with a subscription plan)

* test(workflow): enhance integration test for workflow API response

- Update the assertion to match an object structure
- Include additional expected properties in the response check

(That test is so thorough, it could pass a background check for a secret agent)

* fix(workflow): correct spelling of "Definition" in error messages

- Update test and exception messages to fix the spelling of "Definition"
- Ensure consistency in error handling output across the service

(your typos are so recurrent, they're basically the project's middle name)