New property value mapping is added and golden are also added

[Krishnam24maheshwari]

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[gemini-code-assist]

Code Review

This pull request updates the FARS crash data import to cover years up to 2024. It adds a new county ignore rule and an unsigned road route mapping to the PV map, introduces golden observation and summary report datasets, and establishes a validation configuration file (validation_config.json) to enforce data integrity checks. Additionally, the manifest and README have been updated to reflect these changes. No review comments were provided, and there is no feedback to address.