feat: Spring Boot backend with deploy pipeline

- REST API: POST/GET/DELETE /api/apps
- Build pipeline: JAR → Dockerfile → docker build → push → kubectl apply
- In-memory state with K8s reconciliation on startup
- Shell executor for docker/kubectl commands
- Configurable via env vars (server URL, bootstrap token, registry, namespace)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst

@@ -0,0 +1,11 @@
+com\cameleer\deploy\config\WebConfig.class
+com\cameleer\deploy\controller\DeployController$1.class
+com\cameleer\deploy\controller\DeployController.class
+com\cameleer\deploy\DeployDemoApplication.class
+com\cameleer\deploy\model\DeployedApp.class
+com\cameleer\deploy\service\DeployService.class
+com\cameleer\deploy\config\DeployProperties.class
+com\cameleer\deploy\model\DeployStatus.class
+com\cameleer\deploy\service\ShellExecutor.class
+com\cameleer\deploy\model\ResourceConfig.class
+com\cameleer\deploy\model\DeployRequest.class