Sync nightly TeamRetro health check scores with Postgres and Slack alerts

Description

Quick overview
This workflow runs nightly to fetch each team’s latest closed TeamRetro health checks, normalizes one row per health dimension, and upserts the scores into a Postgres table, sending a Slack alert only when errors occur.

How it works
Runs every day at 02:00 (server time) and ensures the team_health_scores table exists in Postgres.
Retrieves all teams from TeamRetro and, for each team, fetches up to three most recent health checks.
Skips teams without a closed health check and continues processing only checks whose status is closed.
Pulls all dimensions for each closed TeamRetro health check and flattens the ratings into warehouse-ready rows (including the health model and rating scale).
Filters out unrated or failed dimension rows and upserts valid dimension scores into Postgres using (health_check_id, dimension) as the conflict key.
Aggregates outcomes into a single run summary and posts the error details to a Slack channel if any failures are detected.

Setup
Create a TeamRetro credential using an account-scoped API key (tra_) and select it for the TeamRetro nodes.
Add a Postgres credential and confirm the workflow can create and write to the team_health_scores table in your target database.
Add a Slack credential and set the destination channel (for example #data-alerts) for failure notifications.