Updated claude big changes

app/constants.py

@@ -0,0 +1,20 @@
+"""
+EAMCO Auto API Constants
+
+This file contains tank configuration and other constants used throughout
+the auto-delivery management service.
+"""
+
+# Default tank size in gallons (most common residential oil tank)
+DEFAULT_TANK_SIZE_GALLONS = 275
+
+# Maximum fill amounts for different tank sizes (gallons we can actually fill)
+# Tanks cannot be filled to 100% capacity for safety reasons
+TANK_MAX_FILLS = {
+    275: 240,
+    330: 280,
+    500: 475,
+}
+
+# Default max fill when tank size is unknown (based on 275 gallon tank)
+DEFAULT_MAX_FILL_GALLONS = 240