[BUG] Inconsistent datatypes on output parameters

[trevorb1]

Conda environment check

• [X] I have tried using the osemosys-global conda environment.

Current Behavior

The datatypes are incorrect for the following table

Parameter	Index	Actual dtype	Expected dtype
Capital Costs	Year	float	int
Fixed Costs	Year	float	int
OAR	Year	float	int
OAR	Mode	float	int

Expected Behavior

The dtypes of the parameters should follow the Expected dtypes of the above table

Steps To Reproduce

1. Run the workflow
2. Check the parameter data in results/data/*.csv

Operating System

Linux

Log output

No response

Anything else?

No response