MyPy annotated Enum error

[martynia]

diracx/diracx-core/src/diracx/core/models.py

Lines 136 to 138 in 0bc35d3

	class SandboxType(StrEnum):
	Input: str = "Input"
	Output: str = "Output"

When running my tests I'm seeing the following:

diracx-core/src/diracx/core/models.py:137: error: Enum members must be left unannotated  [misc]
diracx-core/src/diracx/core/models.py:137: note: See https://typing.readthedocs.io/en/latest/spec/enums.html#defining-members
diracx-core/src/diracx/core/models.py:138: error: Enum members must be left unannotated  [misc]
diracx-core/src/diracx/core/models.py:138: note: See https://typing.readthedocs.io/en/latest/spec/enums.html#defining-members
Found 2 errors in 1 file (checked 11 source files)
Error: Process completed with exit code 1.

@natthan-pigoux could you have a look into this, please.