Fix get_available_budget validation bug

[RadCod3]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes a validation bug in the get_available_budget functionality by adding proper type conversion for currency_id fields. The issue appears to be that currency_id values are sometimes received as integers but need to be strings for proper validation.

• Adds a Pydantic field validator to convert integer currency_id values to strings
• Imports the necessary field_validator from Pydantic

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[Copilot]

[nitpick] The docstring should be more descriptive about why this conversion is necessary. Consider adding context about the validation bug being fixed and when this conversion is needed (e.g., "Convert currency_id from int to str to fix validation issues when API responses contain integer currency_id values instead of expected string format").

Suggested change

	@field_validator('currency_id', mode='before')
	@classmethod
	def convert_currency_id_to_str(cls, v):
	"""Convert currency_id from int to str if needed."""
	"""
	Convert currency_id from int to str to fix validation issues.
	This conversion is necessary because some API responses may return
	currency_id as an integer instead of the expected string format.
	Without this conversion, Pydantic validation may fail or produce
	unexpected results. This validator ensures that currency_id is always
	a string, as required by the model.
	"""