fix(model): fix qwen3 next bug & update sgalng to 0.5.4.post1

[yuhao-zh]

📝 Change Type

Please select the type of change this PR introduces (choose one or more):

• feat: New feature.
• fix: Bug fix.
• docs: Documentation only changes.
• refactor: A code change that neither fixes a bug nor adds a feature.
• perf: Performance improvement.
• test: Adding missing tests or correcting existing tests.
• chore: Maintenance tasks (e.g., updating dependencies).

💡 Description

Fix Qwen3 next attention layer's bug which make model run failed

Key Changes

1. update backend to hybrid model
2. fix qwen3_next model bug, force paged_size to 1
3. update sglang to 0.5.3

🔗 Related Issues

List any issues this PR closes or relates to:

#101

✅ Checklist

Please ensure the following points are addressed before merging:

• I have performed a self-review of my own code.
• I have added/updated tests that prove my fix or feature works (if applicable).
• I have updated the documentation (if necessary).
• My code follows the project's style guidelines.