feat(mcp): queue long-running calculations

app/algorithms/_utils.py

@@ -3,6 +3,14 @@ import os
 import pandas as pd
 
 
+def calculation_temp_directory(kind: str) -> str:
+    """Keep native outputs inside the supervisor-owned job directory."""
+    root = os.environ.get("TJWATER_CALCULATION_JOB_DIR", "temp")
+    path = os.path.abspath(os.path.join(root, kind))
+    os.makedirs(path, exist_ok=True)
+    return path
+
+
 def fill_time_gaps(
     data: pd.DataFrame,
     time_col: str = "time",