fix: set exit 0 in prepare_samples

scripts/prepare_samples.sh

@@ -3,7 +3,7 @@
 # Check if the "PREPARE_SAMPLES" environment variable is set
 if [ -z "${PREPARE_SAMPLES}" ]; then
     echo "PREPARE_SAMPLES is unset or set to the empty string. Skipping sample preparation."
-    exit 1
+    exit 0
 fi
 
 # Read JSON file into a variable