USFEMA_FloodInsuranceClaims download-fix

[kartik-s21]

This PR resolves download failures in the FEMA NFIP claims data pipeline caused by transient HTTP 503 Service Unavailable errors from the FEMA API.

During heavy load or rapid sequential paging, the FEMA endpoint frequently returns 503 errors, causing the script to abort prematurely with Failed to download chunk or
file not found. Exiting..

Changes Made

• Updated fema_download.py:
  • Increased tries from 3 to 10 in download_file.
  • Increased delay between retries from 5 to 10 seconds in download_file.

PR Checklist -
https://docs.google.com/spreadsheets/d/1SQJmVsUVwyI9P4P7uea2TOQHEOkFUQWZ-ubwKCFzuP8/edit?resourcekey=0-7h8GibY2hKZgbCHAxy_cOQ&gid=1086229089#gid=1086229089

[gemini-code-assist]

Code Review

This pull request increases the retry attempts and delay for downloading FEMA flood insurance claims data. The reviewer noted that the new configuration (10 tries with a delay of 10 and backoff of 2) results in an excessively long cumulative wait time of over 85 minutes, which could trigger execution timeouts. They suggested reducing the number of retries to 6 to keep the total duration within a reasonable limit.

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