Optimization Request for Large Website 100k Setup

My dedicated server runs LiteSpeed with PHP 8.3 and serves a site of roughly 100 k pages. To keep Googlebot happy and stretch my crawl budget, I need every layer of the stack tuned: LiteSpeed itself, the vhost template, php.ini, Redis, and Opcache. On top of that, I depend on a cache-warmup plugin that pre-generates and refreshes all pages overnight, so the configuration must let that job run flat-out without throttling the site for real visitors.

What I expect once the work is complete:
• Clean LiteSpeed and vhost configs that minimise TTFB, honour proper cache-control headers, and play nicely with QUIC/HTTP3.
• A php.ini and Opcache setup sized for high concurrency on PHP 8.3, avoiding memory leaks or restarts during the warm-up cycle.
• Redis tuned for optimal object-cache hit rate while limiting eviction churn.
• Benchmarks showing reduced response times at both warm and cold cache states, plus lower crawl stats in Search Console.
• A short hand-off document so I can repeat the process after future upgrades.

All access (SSH and WebAdmin) is ready; the job can start as soon as you’re available.