Merge pull request #37 from wendev27/monitoring-and-observability

docs: document learning checkpoints and repository branch strategy

Author: wendev27

checkpoints/README.md

@@ -11,3 +11,18 @@ Each checkpoint captures:
 - Skills unlocked
 
 These checkpoints serve as snapshots of my growth throughout this repository.
+
+## Branch Strategy
+
+This repository intentionally keeps historical branches.
+
+Each checkpoint branch represents a learning milestone and its corresponding pull request.
+
+Example:
+
+- checkpoint-10 → GitHub Actions and CI
+- checkpoint-15 → CodeQL and Trivy
+- checkpoint-18 → Secure CI/CD and branch protection
+- monitoring-and-observability → Prometheus and Grafana
+
+Branches are preserved to document the evolution of the learning process rather than to follow a production Git workflow.