Add production features: circuit breaker, exponential backoff, semantic caching, intent-based scope handling

Fix critical bugs: compensation for late orders, escalation detection, conversation history improvements

Fix 5 critical bugs: replace LLM scope validator with embedding similarity, add missing state fields, fix routing, improve timeout handling

Add clarification node for missing order IDs + rule-based fallbacks to prevent 504 timeout

Add scope validation and system capabilities: Handle meta queries and reject out-of-scope questions

Fix all 9 critical bugs: API readiness loop, debug params, timeout, LLM cache, state mutation, requirements split, duplicate file

Initial commit: Olist intelligence layer with database