2026-07-23 — SDKs v0.2.0, estimate_cost, webhook deliveries, bot access restored

@lumifyai/sdk and lumify-sdk v0.2.0; langchain-lumify 0.1.0; n8n-nodes-lumify v0.2.6. Free POST /v1/estimate + MCP estimate_cost; SSE event:reconnect; webhook delivery history with retry backoff. Cloudflare AI-scraper block removed so agent UAs can fetch llms.txt/OpenAPI/docs.