Inside that BIF example, as you mentioned, they do not mention where the bitstream file (in your case system.bit) gets inserted. The bistream should be inserted between the FSBL image and the first user executable (in your case it is uboot.elf) so the Boot Image Format (BIF) l...
But I'm hoping that the other debug output (from your backup restore) might do something interesting: vault/builtin/logical/pki/storage_migrations.go Lines 73 to 121 inbfde310 funcmigrateStorage(ctxcontext.Context,b*backend,slogical.Storage)error{ ...