feat: Module server-impl-quarkus initial

Module d'implémentation serveur pour lions-user-manager

Contenu:
- KeycloakAdminClient avec résilience (Circuit Breaker, Retry, Timeout)
- UserServiceImpl (25+ méthodes)
- RoleServiceImpl (20+ méthodes)
- AuditServiceImpl (logging et statistiques)
- UserResource, RoleResource (REST API)
- Mappers (User, Role)
- Health checks
- Configurations dev/prod séparées

Statut: 🔄 80% complété

🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

src/main/java/dev/lions/user/manager/resource/HealthResourceEndpoint.java

@@ -0,0 +1,72 @@
+package dev.lions.user.manager.resource;
+
+import dev.lions.user.manager.client.KeycloakAdminClient;
+import jakarta.inject.Inject;
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.Produces;
+import jakarta.ws.rs.core.MediaType;
+import lombok.extern.slf4j.Slf4j;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Resource REST pour health et readiness
+ */
+@Path("/api/health")
+@Produces(MediaType.APPLICATION_JSON)
+@Slf4j
+public class HealthResourceEndpoint {
+
+    @Inject
+    KeycloakAdminClient keycloakAdminClient;
+
+    @GET
+    @Path("/keycloak")
+    public Map<String, Object> getKeycloakHealth() {
+        Map<String, Object> health = new HashMap<>();
+
+        try {
+            boolean connected = keycloakAdminClient.isConnected();
+            health.put("status", connected ? "UP" : "DOWN");
+            health.put("connected", connected);
+            health.put("timestamp", System.currentTimeMillis());
+
+            if (connected) {
+                // Récupérer info serveur Keycloak
+                var serverInfo = keycloakAdminClient.getInstance().serverInfo().getInfo();
+                health.put("keycloakVersion", serverInfo.getSystemInfo().getVersion());
+            }
+        } catch (Exception e) {
+            log.error("Erreur health check Keycloak", e);
+            health.put("status", "ERROR");
+            health.put("connected", false);
+            health.put("error", e.getMessage());
+            health.put("timestamp", System.currentTimeMillis());
+        }
+
+        return health;
+    }
+
+    @GET
+    @Path("/status")
+    public Map<String, Object> getServiceStatus() {
+        Map<String, Object> status = new HashMap<>();
+        status.put("service", "lions-user-manager-server");
+        status.put("version", "1.0.0");
+        status.put("status", "UP");
+        status.put("timestamp", System.currentTimeMillis());
+
+        // Health Keycloak
+        try {
+            boolean keycloakConnected = keycloakAdminClient.isConnected();
+            status.put("keycloak", keycloakConnected ? "CONNECTED" : "DISCONNECTED");
+        } catch (Exception e) {
+            status.put("keycloak", "ERROR");
+            status.put("keycloakError", e.getMessage());
+        }
+
+        return status;
+    }
+}