Improvement/ add pandera schema to rapid dataframe schema

[Jarek-Rolski]

This PR adds the panderaDataFrameSchema field to the rAPId Pydantic schema.

Changes included

• Added an optional panderaDataFrameSchema field that requires the Pandera DataFrameSchema type.

• Added pandera_schema_validation function to validate pandera schema and parse_pandera_schema_errors function to parse pandera error message and return it as list of strings.

• Added support for registering custom Pandera checks through the PANDERA_FILE environment variable.

  • The variable stores a JSON object where:

    • keys = file paths
    • values = file contents

  • The API imports these files during startup to register custom checks.

• Updated Terraform configuration to:

  • add a variable for generating the PANDERA_FILE environment variable
  • inject the variable into the ECS service configuration

Compatibility

This change is backward compatible.