Use Datacommons V2 client for geojson fetch

[rohitkumarbhagat]

• Migrates latlng_recon_geojson to the V2 client and wrapper APIs for place-children and property lookups.

• Reintroduces retry behavior for the place-children fetch via dc_api_wrapper to avoid transient failures.

[gemini-code-assist]

Summary of Changes

Hello @rohitkumarbhagat, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly refactors the latlng_recon_geojson module by migrating its DataCommons API interactions to the more modern V2 client and its associated wrapper functions. This change not only updates the underlying API calls for fetching geographical data and properties but also integrates robust retry logic to ensure greater stability and reliability in data retrieval. The accompanying test file has also been updated to reflect these structural changes.

Highlights

• DataCommons V2 Client Migration: The latlng_recon_geojson utility has been updated to utilize the DataCommons V2 client, replacing older API interaction methods.
• API Wrapper Integration: Direct DataCommons API calls have been refactored to use dc_api_wrapper and dc_api_batched_wrapper for fetching place children and property values, centralizing API interaction logic.
• Enhanced API Reliability: Retry mechanisms have been re-introduced for DataCommons API calls, specifically for fetching place-children, to improve resilience against transient network failures.
• Module Import Refactoring: Import statements and module paths in both the main utility and its test file have been updated to use pathlib and relative imports, improving module organization.

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[gemini-code-assist]

Code Review

This pull request successfully migrates latlng_recon_geojson.py to use the DataCommons V2 client and its wrapper APIs, which is a great modernization step. The reintroduction of retry logic for API calls enhances the script's robustness against transient network issues. My review focuses on a small refactoring opportunity to reduce code duplication by using module-level constants for configuration, which will improve the code's maintainability.