CDC_Mortality_Count

[goutamabrol]

Summary

Adds the CDC_Mortality_Count import under statvar_imports/us_cdc/county_mortality/ for CDC WONDER county-level mortality data.

• Data Source: CDC WONDER Underlying Cause of Death (Database D158), covering all ~3,143 US counties from 2018 to 2024.
• Coverage: Maps 116 StatVars (Count_MortalityEvent_<Cause>) across all ICD-10 113 causes, generating ~567k observations.
• Downloader (download.py): Automates session agreements, query partitioning (75k-row cap), and 31-min silent backoff on HTTP 429.
• Mappings: Dynamic 5-digit FIPS zero-padding (geoId/{CountyCode1}) in PV map with no hardcoded county lookup tables.
• Automation (manifest.json): Configured for Cloud Batch execution with download.py, stat_var_processor.py, and weekly cron.
• Validation (validation_config.json): Enforces deletion thresholds.
• Testing: 10/10 unit tests pass locally (download_test.py).
• Cloud Batch Verified: End-to-end job completed with status SUCCEEDED .

PR Checklist - link
Validation - link

[gemini-code-assist]

Code Review

This pull request introduces a new automated importer for CDC WONDER County-Level Mortality Data, including a download script, metadata, mapping files, unit tests, and validation configurations. The reviewer feedback highlights two important improvements for the download script: first, making the is_state_downloaded check more robust to ensure all intermediate years are covered rather than just the first and last; second, modifying the downloader to log errors and continue processing other states instead of immediately terminating the script with logging.fatal when a single state fails.