feat: add thread_id and checkpoint_pk in aside events

[arslanashraf7]

What are the relevant tickets?

https://github.com/mitodl/hq/issues/9264

Description (What does it do?)

• Adds additional fields in tracking events where applicable. The events will additionally have values for thread_id and checkpoint_pk extracted from the content sent to the tracking events handler.

The event would now look like:

2025-12-02 09:43:23,218 INFO 218 [tracking] [user 4] [ip 172.20.0.1] logger.py:41 - {"name": "ol_openedx_chat.drawer.response", "context": {"course_id": "course-v1:Org+CAT+1", "course_user_tags": {}, "user_id": 4, "path": "/courses/course-v1:Org+CAT+1/xblock/aside-usage-v2:block-v1$:Org+CAT+1+type@problem+block@39ac594780a54bc2804ac3da86507264::ol_openedx_chat/handler/track_user_events", "org_id": "Org", "enterprise_uuid": "", "module": {"display_name": "Single select", "usage_key": "block-v1:Org+CAT+1+type@problem+block@39ac594780a54bc2804ac3da86507264"}}, "username": "edx", "session": "2ee80bc4ceb9e8ca4aeca7e85debd271", "ip": "172.20.0.1", "agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36", "host": "local.openedx.io:8000", "referer": "http://apps.local.openedx.io:2000/", "accept_language": "en-US,en;q=0.9”, 
"event": {"value": "Hello! I'm here to help you with your math problem. If you have any questions related to the problem set, feel free to ask, and I'll do my best to guide you.<!-- {\"edx_module_id\": \"block-v1:Org+CAT+1+type@problem+block@39ac594780a54bc2804ac3da86507264\", \"block_siblings\": [\"block-v1:Org+CAT+1+type@video+block@448ced963d50444a8f171e7877ed447b\", \"block-v1:Org+CAT+1+type@problem+block@39ac594780a54bc2804ac3da86507264\"], \"problem\": \"\", \"problem_set\": \"\", \"problem_set_title\": null, \"run_readable_id\": null, \"checkpoint_pk\": 1010101, \"thread_id\": \"c3e6d520b37f4c16b5289d\"} -->", "blockUsageKey": "block-v1:Org+CAT+1+type@problem+block@39ac594780a54bc2804ac3da86507264", "thread_id": "c3e6d520b37f4c16b5289d", "checkpoint_pk": "1010101"}, "time": "2025-12-02T09:43:23.218124+00:00", "event_type": "ol_openedx_chat.drawer.response", "event_source": "server", "page": null}

Screenshots (if appropriate):

• Desktop screenshots
• Mobile width screenshots

How can this be tested?

• Setup chat aside in your edX environment
• The chat should be working properly, so you will need appriate keys to get them working
• Perform chat and notice the tracking events in the logs
• The tracking events should contain values for thread_id and checkpoint_pk explicitely in the payload and not just the content.

Additional Context