Liu An 57b9f8cf52
Fix: Update test assertions and simplify test cases (#9400)
### What problem does this PR solve?

- Fix error message assertion in test_update_chunk.py to match new
ownership validation
- Simplify dataset listing test cases by removing lambda assertions for
sorting
- Fix actions:
https://github.com/infiniflow/ragflow/actions/runs/16885465524/job/47831942553

### Type of change

- [x] Fix test cases
2025-08-12 10:57:30 +08:00
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