REPO — After merge an update-badges workflow refreshes four dynamic shields.io…

After merge an update-badges workflow refreshes four dynamic shields.io badges committed back to main: total submission count, distinct model count, distinct scenario count, and latest-submission date.

Source: puma-community README.md; docs/maintainer-guide.md · Traceability: corpus unit SAT-012 · Confidence: repo-backed

Standalone atomic note — to be wired into its Map of Content during closure.