poc: add 3rd file on writer before read

api_dummy_3.txt

@@ -0,0 +1 @@
+third dummy via API (before pwned read).

nested/rce-bfe0756d-1.git/objects/91/e580a11bb37a5f38820903b3e98c596a88da30

@@ -0,0 +1,2 @@
+x
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+ď.ÎŽ?zcŠEVĆĘi
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nested/rce-bfe0756d-1.git/objects/dd/58b7c3bbce8c8a768543176421fa3539e9ded8

@@ -0,0 +1,3 @@
+x
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+={?°Eõäš
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+yš“z
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