feat: HTTPS Proxy

[gabrielle-ong]

Cortex version

1.0.2

Describe the issue and expected behaviour

HTTP Proxy feature is broken in Jan 0.5.8
Root cause on Cortex: TBC (thanks @namchuai for investigating!)
This is important for users who use HTTPS Proxy to bypass regional restrictions on the internet.

Related Bugs: (Jan x Cortex 0.5.8)

1. bug: HTTP Proxy feature is broken jan#4017
2. Discord #jan-help

Steps to Reproduce

No response

Screenshots / Logs

No response

What is your OS?

• Windows
• Mac Silicon
• Mac Intel
• Linux / Ubuntu

What engine are you running?

• cortex.llamacpp (default)
• cortex.tensorrt-llm (Nvidia GPUs)
• cortex.onnx (NPUs, DirectML)

Hardware Specs eg OS version, GPU

No response