Release 0.4.0 for 25.8.1

[hellt]

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[Copilot]

Pull Request Overview

This PR updates the project to version 0.4.0 for the 25.8.1 release with significant model updates and code generation improvements.

• Updates project version from 0.3.2 to 0.4.0 and pins datamodel-code-generator to exact version 0.33.0
• Adds new v25_8_1 models directory with comprehensive Pydantic models for core EDA functionality
• Replaces datetime imports with AwareDatetime across all model files for better timezone support

Reviewed Changes

Copilot reviewed 29 out of 32 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pyproject.toml	Updates version to 0.4.0 and pins datamodel-code-generator dependency
pydantic_eda/core/v25_8_1_rc1/models.py	Updates existing models with new imports, field descriptions, and new model classes
pydantic_eda/core/v25_8_1/models.py	Creates complete new model set for v25.8.1 with comprehensive EDA core functionality
pydantic_eda/apps/topologies/v1alpha1/models.py	Updates topology models with AwareDatetime support and new topology overlay structures
pydantic_eda/apps/timing/v1alpha1/models.py	Updates timing models with AwareDatetime support and topology metadata
pydantic_eda/apps/system/v1alpha1/models.py	Updates system models with AwareDatetime support and API validation patterns
pydantic_eda/apps/siteinfo/v1alpha1/models.py	Updates siteinfo models with AwareDatetime support and topology structures
pydantic_eda/apps/services/v1alpha1/models.py	Adds new EdgePing functionality and updates existing models with enhanced BFD and routing features
pydantic_eda/apps/security/v1alpha1/models.py	Updates security models with AwareDatetime support and API validation patterns

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