[https://nvbugs/6537081][fix] Fix import error

[2ez4bz]

Dev Engineer Review

• Updated tensorrt_llm/llmapi/__init__.py.
• Added DeepSeekV4SparseAttentionConfig to the public LLM argument configuration imports.
• Exported MultimodalConfig through tensorrt_llm.llmapi.
• These changes address the reported import error and align the public API exports with the available configuration classes.
• No performance or error-handling changes were introduced.

QA Engineer Review

No test changes.

Description

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PR Checklist

Please review the following before submitting your PR:

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• PR Follows TRT-LLM CODING GUIDELINES to the best of your knowledge.

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• tensorrt_llm/llmapi/__init__.py

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Walkthrough

The LLM API module now imports DeepSeekV4SparseAttentionConfig and publicly exports MultimodalConfig.

Changes

LLM API exports

Layer / File(s)	Summary
Update public configuration exports tensorrt_llm/llmapi/__init__.py	The module imports DeepSeekV4SparseAttentionConfig and adds MultimodalConfig to __all__.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: bowenfu, allisonlim-nv, zhaoyangwang-nvidia

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description includes the template and checklist, but the Description and Test Coverage sections are empty.	Add a concise explanation of the issue and solution, and list the relevant tests or explain why no tests are required.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the import error and follows the required NVBugs and fix format.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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PR_Github #62987 [ run ] completed with state SUCCESS. Commit: fdccaa0
/LLM/main/L0_MergeRequest_PR pipeline #51094 completed with status: 'FAILURE'

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