Replace nested loop queries with batch fetches using inArray() across
discovery, tracking, metadata, settings, and system-health services.
The biggest win is getContinueWatchingFeed() going from ~375+ queries
to 5. Add a cached getSession() wrapper via React.cache() to deduplicate
auth lookups shared between layouts and pages. Parallelize independent
async operations in importTitle(), cacheImagesJob(), and the explore page.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
