What the best way to launch the rule engine

Hi !
I'm new to rules engine and json-rules-engine particulary …

I need to apply rules on iot metrics to launch alert through mail, sms, etc …
I have a rules editor in a Vuejs frontend with write the json rules in a postgressql database through a graphql API.

What is the best way to scan my metrics time series table ? Launch rules on insert or with a cron ?

Thanks for your help

The issue mentions a Vue.js frontend, a PostgreSQL time-series table, and a GraphQL API, but names no repository files, tests, or entry points. Start by identifying how rules are currently evaluated and how metric inserts are handled; done would require a documented decision or implementation plan for triggering evaluation and alerts.

Written by the indexing model from the issue text.