feat: modernize application — source, platform artifacts, CI/CD

- chore: ingest source code

111 files from https://github.com/spring-projects/spring-petclinic
- feat: add platform deployment artifacts
- feat: add CI/CD workflow automation

docs/migration-plan.md

@@ -0,0 +1,41 @@
+# Modernization Plan for demo-pg-test
+
+## Application Type
+Java Application
+
+## Selected Modernization Strategy
+- **Migration Approach**: containerize-optimize
+- **Target Platform**: humanitec-v2
+- **Observability**: ENABLED (Prometheus metrics, health checks, tracing)
+- **Security Scanning**: ENABLED (Trivy vulnerability scanning)
+
+## Discovery Summary
+### Discovery Report
+
+#### Application Overview
+The application appears to be a Java-based project using the Spring framework. It includes both Maven and Gradle build configurations, suggesting flexibility in build tools. The presence of Spring Boot dependencies indicates it is likely a web application, possibly a pet clinic or similar management system based on the detected dependencies and API endpoints.
+
+#### Technology Stack
+- **Language**: Java
+- **Framework**: Spring Boot
+- **Build Tools**...
+
+## Generated Artifacts
+1. **Dockerfile**: Optimized with health checks and metrics endpoints
+2. **score.yaml**: Platform intent with service ports and DNS resource
+3. **CI Workflow**: Automated build/push to ACR with Trivy security scanning
+
+## Next Steps
+1. Review and customize generated artifacts
+2. Test container build and run
+3. Deploy to development environment using score.yaml
+4. Validate application functionality
+5. Promote to staging/production via Humanitec
+
+## Migration Strategy Details
+
+### Containerize Optimize
+Add cloud-native patterns: health checks, metrics, optimized base images.
+
+### Platform: humanitec-v2
+score.yaml optimized for Azure Container Apps with managed scaling and Azure-specific configuration.