Add fields to describe vehicle locks

Is your feature request related to a problem? Please describe.

Cities often include policies on locks and locking vehicles so they want to be able to track if vehicles have a lock (or not) and when that lock is in use (or not) as part of the data their getting via MDS.

Describe the solution you'd like

Add a new field for lock that would be used in the same way as vehicle_type or propulsion_type. Not sure if this could be a yes/no field or if there are lock types that would be useful to capture.

Add a new field for lock_status that would be used in the same way as battery_pct. This could probably be expressed as a simple on/off or 0/1.

Is this a breaking change

• No, not breaking

Impacted Spec

For which spec is this feature being requested?

• agency
• provider

Describe alternatives you've considered

Currently there's no way to get this data.

Additional context

[schnuerle]

For lock this may be part of a larger vehicle properties conversation. Then having something like lock_status makes sense.

[schnuerle]

Notes from today's Working Group call:
https://github.com/openmobilityfoundation/mobility-data-specification/wiki/Web-conference-notes,-2021.10.28-(MDS-Working-Group)

Could be part of the vehicle attributes discussion in new modes here: https://docs.google.com/document/d/1lzQl_EvrpiDWcJidmnKhn6bAlOdimEBo5u_Yx0BTfmk/edit#heading=h.6m74qj1b4uv1

Also a discussion happening in GBFS here MobilityData/gbfs#370

Might be more as an event vs a state.

Just because it's locked it may not be locked properly, may need more info/photos to verify.

Lock-to is a requirement in Oakland.

[schnuerle]

If you'd like to make a PR for this we can talk about it as part of MDS 2.1.