v1.7.0

## Surya OCR 3 (inline math, better accuracy/speed)

New OCR model that is more accurate, supports inline math, and is faster on GPU.  Use the `--format_lines` option to OCR inline math properly.

<img width="800" alt="image" src="https://github.com/user-attachments/assets/c51b33f8-a58d-439e-889e-e713294f3a51" />

More benchmarks coming soon on this.  Math recognition appears to be the best available, but not fully validated yet.

## Structured extraction (beta)

We now have an early version of structured extraction.  You pass in a file and a pydantic schema to extract data. You can use it like this:

```python
from marker.converters.extraction import ExtractionConverter
from marker.models import create_model_dict
from marker.config.parser import ConfigParser
from pydantic import BaseModel

class Links(BaseModel):
    links: list[str]
    
schema = Links.model_json_schema()
config_parser = ConfigParser({
    "page_schema": schema
})

converter = ExtractionConverter(
    artifact_dict=create_model_dict(),
    config=config_parser.generate_config_dict(),
    llm_service=config_parser.get_llm_service(),
)
rendered = converter("FILEPATH")
```

This requires you to configure an LLM service - see the docs [here](https://github.com/VikParuchuri/marker?tab=readme-ov-file#llm-services).

There is a structured extraction gui app, which you can run with:

```shell
pip install streamlit streamlit-ace
marker_extract
```

## OCR converter

You can now run OCR and keep characters from marker.  This will allow for block equations to be handled properly.  You can use it like this:

```python
from marker.converters.ocr import OCRConverter
from marker.models import create_model_dict

converter = OCRConverter(
    artifact_dict=create_model_dict(),
)
rendered = converter("FILEPATH")
```

## Misc improvements

- The PDFconverter can now take an io.BytesIO object instead of a filepath.
- Fixed some rare bugs with merging blocks together.

## What's Changed
* Keep chars by @VikParuchuri in https://github.com/VikParuchuri/marker/pull/662
* Keep chars by @VikParuchuri in https://github.com/VikParuchuri/marker/pull/665
* Structured extraction by @VikParuchuri in https://github.com/VikParuchuri/marker/pull/687
* WIP: Foundation Model Integration by @tarun-menta in https://github.com/VikParuchuri/marker/pull/616
* New OCR model, structured extraction beta by @VikParuchuri in https://github.com/VikParuchuri/marker/pull/693


**Full Changelog**: https://github.com/VikParuchuri/marker/compare/v1.6.2...v1.7.0