When the user creates the model training, createdAt and updatedAt have very tiny difference but should be the same

[BPylypenko]

Description
When the user creates the model training, createdAt and updatedAt have very tiny difference but should be the same.

Other related entities:

• Model Training
• Model Packaging
• Batch Inference Service
• Batch Inference Job

Steps to Reproduce

1. Go to the Swagger API: (<odahu-cluster-name>/swagger/index.html#/Training/)
2. Make POST request.
3. Notice that createdAt and updatedAt values have tiny difference.
4. Make GET request for the training from step (2).
5. Notice that createdAt and updatedAt values are shorter than from step (3).

Specification:
model-training-specification.txt

Actual result
The createdAt and updatedAt fields have different values after creation of entity.
And POST request returns longer values than GET request.

Expected result
The createdAt and updatedAt values are the same.
And GET request returns the same as POST request.

Attachments
POST request:

GET request after POST:

Environment:

• ODAHU version: 1.6.0