Wire local-only data setup workflow

scripts/01_prepare_data.sh

@@ -4,4 +4,25 @@ set -euo pipefail
 repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
 cd "$repo_root"
 
-Rscript -e 'setwd("data"); source("../src/r/00_data-management.R")'
+required_model_inputs=(
+  "data/text_data.csv"
+  "data/expert.csv"
+  "data/lr_data.csv"
+  "data/union_mapping.csv"
+  "data/party_families.csv"
+)
+
+missing=0
+for input in "${required_model_inputs[@]}"; do
+  if [ ! -s "$input" ]; then
+    echo "Missing model-ready input: $input" >&2
+    missing=1
+  fi
+done
+
+if [ "$missing" -ne 0 ]; then
+  echo "Regenerate model inputs with data-setup/run_data_setup.sh, or restore the included data/ files." >&2
+  exit 1
+fi
+
+echo "Model-ready data inputs are present."