Describe the bug
Requests using the librairie behind a proxy with the ibm_quantum_channel take 3 minutes.

Steps to reproduce

1. Set up an isolated environnement that uses a proxy to access internet.
2. initiate a service QiskitRuntimeService(..., channel="ibm_quantum_channel", proxies = ...)
3. Make any request (.backends()/.jobs())

Expected behavior
Requests take at most 7s to execute.

Suggested solutions

Add proxy configuration to the token manager .

Additional Information

• qiskit-ibm-runtime version: 0.40.1
• Python version: 3.12
• Operating system: Win11