Align docstring parameters with function signatures across PaddleScience

[Copilot]

Docstrings across PaddleScience had mismatched parameter names, missing entries, or outdated types, causing confusion versus actual type hints and signatures.

• Solver/Utils: Added missing parameters (ddp_model, delimiter, check_exist, decompress) to docstrings to mirror function signatures.
• Geometry & Mesh: Synchronized sampling docstrings with actual arguments, documenting random options and criteria usage.
• Datasets: Corrected parameter names and completeness (e.g., SEVIR event_idx, downsampling args, SyntheMol add_h, CGCNN distances).
• Encoders/Decoders: Clarified forward method inputs/outputs for cuboid/extformer components and positional embedding helpers.
• Experimental Math: Updated integration helpers to reflect integration_domains usage and result inputs.

Example:

def get_path_from_url(url, root_dir, md5sum=None, check_exist=True, decompress=True):
    """Download from given url to root_dir.

    Args:
        url (str): Download url
        root_dir (str): Root dir for downloading
        md5sum (str): md5 sum of download package
        check_exist (bool): Skip download if present and valid. Defaults to True.
        decompress (bool): Decompress tar/zip after download. Defaults to True.
    """

Original prompt

请帮忙修复PaddleScience中所有.py文件中的基础错误，比如

docstring中的参数类型和实际参数type hint没对齐
docstring中的参数名字和实际参数名字没对齐
docstring中的参数个数和实际参数个数没对齐

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