Standardize Fourier_Space value in Tomogram Reconstruction Software Enum

[manasaV3]

In the tomogram schema, the reconstruction_software enum currently includes a value labeled Fourier Space (with a space). This value causes issues during downstream processing and integration due to the whitespace. Additionally, this value is inconsistently used—currently, the only dataset(Dataset 10003) using this value has it set as Fourier_Space (with an underscore) in the db.

To ensure consistency and prevent technical issues, we need to standardize this enum value in the schema to Fourier_Space.