Local Context Data can be set to non-none falsy values

[fabi125]

Deployment Type

Self-hosted

NetBox Version

v4.2.5

Python Version

3.10

Steps to Reproduce

1. Edit a device in the UI (e.g. https://demo.netbox.dev/dcim/devices/37/)
2. Put in 0 as the local config context and save.

Expected Behavior

Change gets rejected for not being correct JSON (like it does for any other flat values).
Config Context also correctly rejects 0 or "" values.

Observed Behavior

Change is accepted.

Relevant code: https://github.com/netbox-community/netbox/blame/v4.2.5/netbox/extras/models/configs.py#L202-L206

Happy to put up a PR for this.

[jnovinger]

Thanks for volunteering @fabi125 , assigned it to you.