fix: Added missing model definitions for statistics

[jassent]

Fixes

Resolves: #624

Fixes these statistics models:
Twilio.Rest.Taskrouter.V1.Workspace.Worker.WorkerStatisticsResource
Twilio.Rest.Taskrouter.V1.Workspace.Worker.WorkersCumulativeStatisticsResource
Twilio.Rest.Taskrouter.V1.Workspace.Worker.WorkersRealTimeStatisticsResource

The prior models are missing definitions for statistical subresources that cause deserialization to return empty/null. Other statistics models are impacted by this same issue. Suggest that developers check for other statistics definitions using object instead of a strongly typed object.

Checklist

• I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the Contribution Guidelines and my PR follows them
• I have titled the PR appropriately
• I have updated my branch with the main branch
• I have added ran tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

[JenniferMah]

The changes are to generated code so we'll have to make changes in the generator. We have this on our internal backlog (DI-2274)

[jassent]

The changes are to generated code so we'll have to make changes in the generator. We have this on our internal backlog (DI-2274)

Understood. Thank you for reviewing and the explanation. Up to you whether or not to close.