Added Goldens

[shourya116]

Jobs ran successfully. Added Golden Checks.
Files added are : golden_data/, manifest.json, validation_config.json

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[gemini-code-assist]

Code Review

This pull request introduces golden data validation for the US EPA Air Quality Index script. It adds golden observation and summary report CSV files, configures a new validation_config.json with validation rules (such as checking deleted records percentage and verifying output data against the golden datasets), and updates the manifest to include these new files and validation configurations while adjusting resource limits. I have no feedback to provide as there are no review comments.