Align datatype of time fields #265
Description
Sometimes timestamp fields are strings and sometimes numbers.
e.g. in IJob start_end and end_time are strings and in IOberservationMatrixMetadata start_time is a number.
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Sometimes timestamp fields are strings and sometimes numbers.
e.g. in IJob start_end and end_time are strings and in IOberservationMatrixMetadata start_time is a number.