feat: Improve retries, remove requests dependency

[mschfh]

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[Copilot]

Pull Request Overview

This PR migrates from synchronous requests library to async aiohttp with retry capabilities, adds file size limit checking, and fixes a logging deprecation warning.

• Replaces requests with aiohttp and aiohttp-retry for async HTTP operations
• Implements exponential retry logic and file size limit validation (100 MB)
• Updates logger.warn to logger.warning to address deprecation

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 6 comments.

File	Description
pyproject.toml	Replaces requests==2.32.5 dependency with aiohttp-retry==2.9.1
uv.lock	Updates lock file to reflect dependency changes, removing requests, charset-normalizer, and urllib3, adding aiohttp-retry
update-lists.py	Converts catalog fetch and file downloads to async/await, adds retry logic, implements file size checking, and fixes logging deprecation

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