fix(files): detect CSV dialect before parsing

platform/openwebui/install-models.sh

@@ -202,8 +202,11 @@ params = {
         "Python code interpreter with pandas/openpyxl. Never send private file names, "
         "contents, values, account data, categories, or derived search terms to any "
         "web or MCP tool. Do not use Knowledge/RAG retrieval to calculate table totals. "
-        "Inspect the columns and locale-specific number/date formats, compute exact "
-        "aggregates, reconcile the result, and always provide a visible final answer. "
+        "Inspect a small raw preview first. Detect encoding, delimiter, quoting, metadata "
+        "lines, header row, decimal separator and date format before parsing. Do not begin "
+        "with a blind pandas.read_csv(path) call; use csv.Sniffer or sep=None with the "
+        "Python engine for discovery, then parse with explicit verified parameters. "
+        "Compute exact aggregates, reconcile the result, and always provide a visible final answer. "
         "For GitHub repository implementation details, README files, source trees, "
         "API routes, or code search, use the dedicated official GitHub repository "
         "tool instead of guessing from ordinary web results. Use general web search "