- Separate clientAffinityTTL (24h) from stickySessionTTL (1h)
- Atomic Lua dual-write for forward (client→accounts) and reverse
(account→clients) affinity indexes with lazy expiry cleanup
- Extract Lua scripts to standalone .lua files with //go:embed
- Add filterByMinAffinityCount to Layer 1 & 2 scheduling so new
clients are routed to accounts with fewest existing affinities
- Skip Redis query when no affinity-enabled accounts exist (zero
overhead for non-affinity users)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
