PXD-398 ⁃ peregrine not properly handling numeric attribute filters in graphql

[frickjack]

For example - @cgmeyer reports in bloodpac:

This query:

{ 
	submitted_unaligned_reads (file_size: 214432432){
    	file_name
    	file_size
    	md5sum
    	submitter_id
    	project_id
    }
}

incorrectly returns no results - it should include the matching records from this:

{ 
	submitted_unaligned_reads (project_id:"bpa-USC_OPT1_T1"){
    	file_name
    	file_size
    	md5sum
    	submitter_id
    	project_id
    }
}