Adjust for iam-units 2025-10-13

- Call iam_units.configure_currency() at the top level. The default was
  deprecated in iam-units and in 2025-10-13 is no longer present.
- Ignore one type error, to be fixed upstream.

Author: khaeru

message_ix_models/__init__.py

@@ -1,8 +1,8 @@
 import sys
 from importlib.metadata import PackageNotFoundError, version
 
+import iam_units
 import pint
-from iam_units import registry
 
 from message_ix_models.util._logging import setup as setup_logging
 from message_ix_models.util.config import Config
@@ -24,7 +24,8 @@
 setup_logging(console=False, file=False)
 
 # Use iam_units.registry as the default pint.UnitsRegistry
-pint.set_application_registry(registry)
+iam_units.configure_currency("EXC", "2005")
+pint.set_application_registry(iam_units.registry)
 
 # Ensure at least one Context instance is created
 Context()

message_ix_models/model/emissions.py

@@ -135,7 +135,10 @@ def get_emission_factors(units: Optional[str] = None) -> "AnyQuantity":
         # Identify a GWP factor for target `units`, if any
         to_units, to_species = split_species(units)
         gwp_factor = convert_gwp(
-            "AR5GWP100", (1.0, str(result.units)), "C", to_species
+            "AR5GWP100",
+            (1.0, str(result.units)),
+            "C",
+            to_species,  # type: ignore [arg-type]
         ).magnitude
     else:
         gwp_factor, to_units = 1.0, result.units