docs: 更新 lighter-python-main 文档，添加示例代码和 API 说明，重构部分内容以提高可读性

docs/lighter/lighter-python-main/docs/RiskParameters.md

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+# RiskParameters
+
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**market_id** | **int** |  | 
+**collateral** | **str** |  | 
+**total_account_value** | **str** |  | 
+**initial_margin_req** | **str** |  | 
+**maintenance_margin_req** | **str** |  | 
+**close_out_margin_req** | **str** |  | 
+
+## Example
+
+```python
+from lighter.models.risk_parameters import RiskParameters
+
+# TODO update the JSON string below
+json = "{}"
+# create an instance of RiskParameters from a JSON string
+risk_parameters_instance = RiskParameters.from_json(json)
+# print the JSON string representation of the object
+print(RiskParameters.to_json())
+
+# convert the object into a dict
+risk_parameters_dict = risk_parameters_instance.to_dict()
+# create an instance of RiskParameters from a dict
+risk_parameters_from_dict = RiskParameters.from_dict(risk_parameters_dict)
+```
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+