Fix fluid caravan interrupt migrations

Not all fluid conditions include the word "fluid"!

Resolves pyanodon/pybugreports#1439

Author: oorzkws

changelog.txt

@@ -1,4 +1,9 @@
 ---------------------------------------------------------------------------------------------------
+Version: 3.0.64
+Date: ???
+  Changes:
+    - Fixed failure migrating certain fluid caravan interrupts
+---------------------------------------------------------------------------------------------------
 Version: 3.0.63
 Date: 2026-03-28
   Changes:

scripts/caravan/caravan-prototypes.lua

@@ -473,7 +473,7 @@ py.on_event(py.events.on_init(), function(changes)
         for _, condition in pairs(interrupt_data.conditions or {}) do
             local elem_value = condition.elem_value
             if elem_value ~= nil then
-                local elem_type = condition.type:find("fluid") and "fluid" or "item"
+                local elem_type = (condition.type:find("fluid") or condition.type:find("tank")) and "fluid" or "item"
                 condition.elem_value = migrate_proto(elem_value, elem_type, migrations)
                 if condition.elem_value == nil then
                     error_caravan(interrupt_name, elem_value, elem_type)