cognitum-analytics — moved out

The RuFlo funnel analytics endpoint now lives in its own repo:

https://github.com/cognitum-one/ruflo-funnel-api

per ADR-311 (server-side split from OSS CLI lifecycle).

Client contract (POST /v1/events) unchanged — see ADR-308. Server implementation, Cloud Function source, Firestore schema, and deploy scripts are all in the dedicated repo.

Client transport (this repo) points at https://funnel.ruv.io/v1/events by default — the Cloud Run domain mapping onto the deployed function. Override with the RUFLO_FUNNEL_EVENTS_ENDPOINT env var for staging or self-hosted deployments.