Create meter read timestamp custom validation

[musayann]

Objective

We want to validate measurements timestamps automatically without having to do it manually in the controller.

Description

• Move the timestamp validation into custom validation instead of being in the controller
• follow this link on how to create a custom validation: https://github.com/typestack/class-validator?tab=readme-ov-file#custom-validation-decorators
• The validators should be in /src/validations

Acceptance Criteria

• The custom validation should be done based on the class-validator library
• The custom validation should have a decorator that can be used in any DTO
• The reads controller should be updated to remove any redundancy in measurement timestamp validations