Look into webhooks in order to only refresh redis-cache when airtable data is updated

Airtable is integrated with [Zapier](https://zapier.com/apps/airtable/integrations), which can be used to trigger many things when a new record is created(in our case, Node code). See if we can use this to just hit an endpoint on our API when a record is created(edited?) and only refresh the redis cache in that instance, instead of every half hour

Start by investigating the Airtable-to-Zapier integration and the Node API endpoint that could receive record-created or edited events. Trace how the Redis cache is currently refreshed and determine whether webhook-triggered refreshes can replace the half-hour schedule; done means the cache refreshes only after relevant Airtable updates.

Written by the indexing model from the issue text.