fidelity and duration in macro

[JacobHast]

I'm wondering why QuamMacro has fidelity and duration attributes? For some macros these attributes don't really make sense.
E.g.,

• a qubit reset macro based on repeated measurements until 0 is measured doesn't have fixed duration
• the CliffordMacro in the documentation doesn't have a fixed duration, as it depends on which Clifford is being applied
• a flattop macro that plays a flattop pulse for spectroscopy doesn't have a "fidelity"

At the least it would be nice with some documentation explaining the purpose of these fields :)
Or if they're critically used further up the stack, maybe it makes sense to further define a "GateMacro" or something similar, where these attributes are non-optional