Handle warnings of type conversions when accessing batches

Micael Oliveirarequested to merge
batch_type_conversions into develop

Description

Fix several warnings related to type conversions when accessing batches.

News snippet

Handle warnings of type conversions when accessing batches

Checklist

  • I have checked that my code follows the Octopus coding standards
  • I have added tests for all the new features added in this request.

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