Fix rate limiting by reusing global session cookies

[uprightbass360]

Summary

• Per-channel cookie jars start empty, forcing a separate modify/authentication login call for each channel playback request
• Rapid back-to-back logins trigger SiriusXM API rate limiting (HTTP 500), breaking both channel listing and stream playback
• Fix: get_channel_cookie_jar() now always returns the global cookie jar so all channels share the single authenticated session from proxy startup

Problem

When a user browses SiriusXM channels and plays one, the proxy makes two login calls in quick succession (one global at startup, one per-channel for playback). SiriusXM's API returns 500 on the second call, and the proxy fails to serve the stream. Repeated restart attempts compound the rate limiting, sometimes blocking logins for several minutes.

Solution

Reuse the global cookie jar for all channel requests instead of creating isolated per-channel jars. The existing session-expiry and re-auth logic (codes 201/208) continues to handle token refreshes.

Test plan

• Proxy starts and authenticates once globally
• Channel listing loads without additional login calls
• Channel playback works without triggering rate limits
• Tested with live SiriusXM subscription streaming multiple channels

[paul-1]

The authentication cookies are infact long lived and common across all sessions, but are you sure sessionid's are not channel specific?

I've never seen rate limiting, except when I do a bunch of application restarts. Which is why I'm testing a branch that saves cookies and reloads them across application restarts.

Another question, are you running the plugin from a manual install from git, because the current state of the main branch is not the version that is on the Plugin Installer.

[uprightbass360]

Hi Paul, apologies I didn't pull your working branch when I was debugging. I just made the fix and shot the pr using an automation. Its possible that there was an underlying change that addressed the issue in your current code but my observation was that the per-channel cookie jar was unnecessary and just led to tons of auth calls that led to my player failing to load and my account getting repeatedly rate limited. Great plugin though, I was listening all last night.

[paul-1]

No need to apologize, if your running from a manual install from git. Look at the other open pull request, that is the final version I'm testing. But I'll look at what you proposed.