added more test data for impossible parents

standardised-data-forbidden-parents.csv

@@ -1,2 +1,2 @@
-ID,Line / Strain (Name),DOB,Father 1,Mother 1,Father 2,Mother 2,Sacrifice reason,Mutation 1,Grade 1,Father 1: Mutation 1,Father 1: Grade 1,Father 2: Mutation 1,Father 2: Grade 1,Mother 1: Mutation 1,Mother 1: Grade 1,Mother 2: Mutation 1,Mother 2: Grade 1
-ID-006,Line-A,15/12/2025,ID-F1,ID-M1,ID-F2,ID-M2,End of experiment,Mut-A,hom,Mut-A,hom,Mut-A,hom,Mut-A,het,Mut-A,het
+ID_offspring,line_name,date_of_birth,ID_father_1,ID_father_2,ID_mother_1,ID_mother_2,sacrifice_reason,n_mutations,mutations,genotype_offspring,genotype_father_1,genotype_father_2,genotype_mother_1,genotype_mother_2
+ID-006,Line-A,15/12/2025,ID-F1,ID-F2,ID-M1,ID-M2,End of experiment,1,Mut-A,hom,hom,hom,het,het