* docs: move entity labels detail to memory-banks, simplify retain overview
* docs: move entity labels blurb under entity-recognition section in retain
* docs: update metadata filtering FAQ to cover entity graph retrieval and entity labels tag option
* docs: enable TOC and fix missing separators in FAQ
* docs: add benchmarks leaderboard screenshot and link to models page
* docs: add 'Which model should I use?' FAQ entry with leaderboard screenshot
* docs: fix leaderboard description to cover retain, reflect, and observations
* feat(go-client): add NewAPIClientWithToken helper and expand recall vs reflect FAQ
- Add NewAPIClientWithToken convenience function to Go client for easy authenticated client creation
- Expand FAQ with detailed "When should I use recall vs reflect?" guidance including practical examples
* fix(go-client): add go build to CI and preserve hindsight_client.go in generator
- Add explicit 'go build ./...' step before integration tests for faster compile feedback
- Preserve hindsight_client.go as a maintained file in generate-clients.sh
