fix(download): improve download_and_unzip error handling - #342
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The retry loop in
download_and_unzipcould hang if it encountered a persistently failing/stalling endpoint, either blocking forever on the read or retryingHTTPErrorindefinitely with no backoff.timeout(default 30s) tourlopen, mirroringfetch_url's existing timeout paramURLErrorandConnectionErrorin addition toHTTPErrorraiseafter exceeding the retry count, guaranteeing the loop terminates