[Fix]: Add user_state_collection handling in unit test upload_parse_r…

[Stanford997]

Context

Changes

Unit test test_upload.py: add user_state_collection handling

Screenshot (if applicated)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
app.py	104	46	56%	40–41, 48–55, 60–90, 97, 101, 106, 110, 121, 126, 128, 133, 137, 146–160, 164
modules
evaluator.py	56	14	75%	96–97, 104–122
langgraph_qa.py	19	18	5%	2–33
parser.py	12	1	92%	20
upload.py	25	3	88%	23, 46–47
TOTAL	216	82	62%

Tests	Skipped	Failures	Errors	Time
11	0 💤	0 ❌	0 🔥	33.033s ⏱️

[adamma1024]

LGTM