Draft: Model Versions API Dump

Implementing the MLFlow APIs for ModelVersion as requested here: #427454

This MR goes "breadth-first" i.e. to define all the endpoints, ensure the API schema is identical to MLFlow API and provide mock responses.

✅ ModelVersion endpoints introduced:

• /create
• /get
• /delete
• /update Missing from original issue, added upon review
• /get-download-uri
• /search

✅ Entities for mapped responses to MlFlow API:

• Entities::MlFlow::ModelVersions::Responses::Create
• Entities::MlFlow::ModelVersions::Responses::Get
• Entities::MlFlow::ModelVersions::Responses::Delete
• Entities::MlFlow::ModelVersions::Responses::Update
• Entities::MlFlow::ModelVersions::Responses::GetArtifactUri
• Entities::MlFlow::ModelVersions::Responses::Search

✅ Entities for mapping core MLFlow API types

• Entities::MlFlow::ModelVersions::Types::ModelVersion
• Entities::MlFlow::ModelVersions::Types::ModelVersionTag

✅ Services with mock implementation

• Ml::ModelVersions::CreateModelVersionService
• Ml::ModelVersions::GetModelVersionService
• Ml::ModelVersions::DeleteModelVersionService
• Ml::ModelVersions::UpdateModelVersionService
• Ml::ModelVersions::GetArtifactUriService
• Ml::ModelVersions::SearchModelVersionsService

These services return mock responses that are mapped to MlFlow response entities.

⏳ In-progress

• Tests