docs(qnn_backend): update AOT execution flow documentation

[oreomaker]

Please check Guidelines for Contributing.

Summary by CodeRabbit

• Documentation
  • Updated AOT execution workflow documentation to reflect changes in export formats and compilation steps for quantized neural network backends.

[coderabbitai]

📝 Walkthrough

Walkthrough

Documentation update to the AOT execution guide reflecting changes in the model export and compilation workflow. The three-stage flow description now documents use of .safetensor and .mllm file formats instead of .mir, with mllm-convertor converting between formats during the Model Quantization and Export step.

Changes

Cohort / File(s)	Summary
Documentation docs/qnn_backend/aot_execute.rst	Updated three-stage flow descriptions: Model Quantization now exports to .safetensor with subsequent .mllm conversion via mllm-convertor; Offline Compilation loads .mllm file instead of .mir.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A format found its way through gates,
From mir to safetensor, it awaits,
Convertor works its magic spell,
Now mllm's story we shall tell,
Documentation shines so bright! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The pull request description only contains the repository's contribution template boilerplate with a link to guidelines, but provides no substantive information about the changes, rationale, or impact.	Add a meaningful description explaining what was updated in the AOT execution flow documentation, why these changes were necessary, and any relevant context for reviewers.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically summarizes the main change: updating AOT execution flow documentation for the qnn_backend component.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

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• Create PR with unit tests
• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@docs/qnn_backend/aot_execute.rst`:
- Line 21: Replace the incorrect singular extension ".safetensor" with the
correct plural ".safetensors" in the sentence that describes exporting the
quantized model (the line mentioning "export it to ``.safetensor`` file");
ensure this matches the other occurrences of ".safetensors" in the document for
consistency.

[coderabbitai]

⚠️ Potential issue | 🟡 Minor

Fix file extension inconsistency.

The file extension should be .safetensors (plural) to match the standard format name and maintain consistency with the rest of the document (lines 33, 42, 44, 49 all use .safetensors).

📝 Proposed fix

-1.  **Model Quantization and Export (Python)**: On the host machine, a Python script is used to quantize the pre-trained floating-point model and export it to ``.safetensor`` file. The ``.safetensor`` is then converted to ``.mllm`` file using mllm-convertor.
+1.  **Model Quantization and Export (Python)**: On the host machine, a Python script is used to quantize the pre-trained floating-point model and export it to ``.safetensors`` file. The ``.safetensors`` is then converted to ``.mllm`` file using mllm-convertor.

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	1. **Model Quantization and Export (Python)**: On the host machine, a Python script is used to quantize the pre-trained floating-point model and export it to ``.safetensor`` file. The ``.safetensor`` is then converted to ``.mllm`` file using mllm-convertor.
	1. **Model Quantization and Export (Python)**: On the host machine, a Python script is used to quantize the pre-trained floating-point model and export it to ``.safetensors`` file. The ``.safetensors`` is then converted to ``.mllm`` file using mllm-convertor.

🤖 Prompt for AI Agents

In `@docs/qnn_backend/aot_execute.rst` at line 21, Replace the incorrect singular
extension ".safetensor" with the correct plural ".safetensors" in the sentence
that describes exporting the quantized model (the line mentioning "export it to
``.safetensor`` file"); ensure this matches the other occurrences of
".safetensors" in the document for consistency.

[chenghuaWang]

LGTM