fix: improve ip restriction middleware performance and reliability

[sentry-autofix]

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This fix was triggered by DB

Fixes BLT-DJANGO-1EK

• Implemented more efficient cache clearing and repopulation for blocked IPs, IP networks, and user agents using cache.delete_many and cache.set_many.
• Optimized database queries by fetching all blocked data in a single atomic transaction.
• Added error handling with logging to prevent cache update failures from interrupting save/delete operations.
• Pre-load cache on middleware startup to avoid initial database hits.
• Added database connection pooling using django-db-connection-pool for improved performance.
• Implemented asynchronous handling of IP recording and block count incrementing to prevent blocking the main thread.
• Added redis connection pool configuration.

If you have any questions or feedback for the Sentry team about this fix, please email [email protected] with the Run ID: 8427.