bug: Model - New model.json causing unable to load old model downloaded from Hub, needs modification / redownloading

[Van-QA]

Describe the bug New model.json causing unable to load old model downloaded from Hub, needs modification / redownloading

Steps to reproduce Steps to reproduce the behavior:

1. Model with old model JSON
2. Update Jan app
3. Try to load the same model

Expected behavior After updated, users should be able to use the old model without any issues

Screenshots

Environment details

• Operating System: MacOS
• Jan Version: latest nightly build
• Processor: Apple M2 Pro
• RAM: 16GB

Logs If the cause of the error is not clear, kindly provide your usage logs:

• tail -n 50 ~/jan/logs/app.log if you are using the UI
• tail -n 50 ~/jan/logs/server.log if you are using the local api server Making sure to redact any private information.

Additional context Add any other context or information that could be helpful in diagnosing the problem.

[Van-QA]

Additional fix needed for the schema validation of all model.json files, per each Jan app update @louis-jan

[freelerobot]

Can I understand the status of this tomorrow? 🙏 @Van-QA

[louis-jan]

I have added support for backward compatibility #2018

[Van-QA]

Tested and looking good on Jan v0.4.6-277 ✅