simplify test_data to troubleshoot

pyrat-api-multiple-response-multiple-parents.csv

@@ -1,4 +1,2 @@
 ID,Species,Sacrifice reason,DOB,Line / Strain (Name),Mutation 1,Grade 1,Mother,Mother2,Father,Father2,Mother: Mutation 1,Mother: Grade 1,Mother2: Mutation 1,Mother2: Grade 1,Father: Mutation 1,Father: Grade 1,Father2: Mutation 1,Father2: Grade 1
 ID-001,Mouse,Not usable age,2026-02-03,Line-A,Mut-A,het,ID-101,ID-103,ID-102,,Mut-A,het,Mut-A,het,Mut-A,wt,,
-ID-002,Mouse,Not usable age,2026-02-04,Line-A,Mut-A,het,ID-101,ID-105,ID-100,,Mut-A,het,Mut-A,hom,Mut-A,het,,
-ID-003,Mouse,Not usable age,2026-02-05,Line-A,Mut-A,het,ID-101,ID-103,ID-100,ID-102,Mut-A,het,Mut-A,het,Mut-A,het,Mut-A,wt