Debug Doctor

### What problem does this PR solve? Add sessions deletion support for agent in http and python api ### Type of change - [ ] Bug Fix (non-breaking change which...

### What problem does this PR solve? LLM library update ### Type of change - [x] Other : config update

Feat: add OCR's muti-gpus and parallel processing support

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### What problem does this PR solve? Add OCR's muti-gpus and parallel processing support ### Type of change - [x] New Feature (non-breaking change which adds functionality)

Feat: add OCR's muti-gpus and parallel processing support

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### What problem does this PR solve? Add OCR's muti-gpus and parallel processing support ### Type of change - [x] New Feature (non-breaking change which adds functionality) @yuzhichang I've tried...

[Bug]: PDF parsing failed with NCCL error using gpus

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### Self Checks - [x] I have searched for existing issues [search for existing issues](https://github.com/infiniflow/ragflow/issues), including closed ones. - [x] I confirm that I am using English to submit this...