Add active/mutable field to input parameters endpoint

[robcalon]

When processing scenario parameters the inputs endpoint at https://engine.energytransitionmodel.com/api/v3/scenarios/xxxx/inputs provides valuable information on which parameters are active in the model and which parameters are disabled. Unfortunately, all parameters are set to disabled when accessing a read_only scenario making it harder to process read_only scenarios from this endpoint.

Would it be possible to add an addition flag to the input parameters to make a distinction between the parameter being used by ETEngine in evaluating the scenario and the current user being allowed to change the parameter via the API?

Additionally a third field could be desirable to indicate if an external coupling node has been activated. I currently see only two imperfect ways to check if an external coupling node is in use:

• Check if an user value has been set for a external coupling parameter This unfortunately does not work in cases where the scenario uses another scenario as template as this will set the default value as the user value of the copied scenario.
• Check disabled inputs that have a disabled_by field This is also not a viable option for read_only scenarios due to all parameters being listed as disabled (as described above).

Especially with the recently implemented multi user support for scenarios I'm expecting some issues when read_only users need to export scenario data via the API.

[robcalon]

@noracato could you also have a look at the options for this one?

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[noracato]

Should be fixed now!