清理CSV回测demo入口

scripts/verify-no-legacy-data-source.sh

@@ -117,4 +117,22 @@ if [[ -n "$truth_csv_hits" ]]; then
   fail "CSV truth stock-list overrides are not allowed in fidc-backtest-engine runtime; use Source Lake runtime spec selection only" "$truth_csv_hits"
 fi
 
+csv_snapshot_loader_hits="$(
+  rg -n \
+    --glob '!**/.git/**' \
+    --glob '!**/target/**' \
+    --glob '!**/docs/**' \
+    --glob '!**/*.md' \
+    --glob '!**/tests/**' \
+    --glob '!**/*test*.rs' \
+    --glob '!scripts/verify-no-legacy-data-source.sh' \
+    'from_csv_dir|from_partitioned_dir|instruments\.csv|candidate_flags\.csv|market\.csv|benchmark\.csv' \
+    crates Cargo.toml \
+    2>/dev/null || true
+)"
+
+if [[ -n "$csv_snapshot_loader_hits" ]]; then
+  fail "CSV snapshot loaders are not allowed in fidc-backtest-engine runtime; construct DataSet from Source Lake components" "$csv_snapshot_loader_hits"
+fi
+
 printf '[OK] fidc-backtest-engine has no legacy runtime data-source references\n'