MAJOR: Complete OIDC migration - Remove JWT custom auth, integrate Keycloak OIDC

- Remove quarkus-smallrye-jwt extension
- Delete JwtService, AuthServiceImpl, AuthService interface
- Replace AuthResource with OIDC-based implementation
- Update SecurityService to use SecurityIdentity instead of JWT
- Configure OIDC with Keycloak (bearer-only backend)
- Add PostgreSQL configuration
- Update entity relationships and database migrations
- Remove JWT-related tests and configurations

BREAKING CHANGE: Authentication now requires Keycloak OIDC tokens

src/main/java/com/gbcm/server/impl/entity/Client.java

@@ -177,6 +177,18 @@ public class Client extends BaseEntity {
     @Size(max = 100, message = "La source d'acquisition ne peut pas dépasser 100 caractères")
     private String acquisitionSource;
 
+    /**
+     * Date de début de service.
+     */
+    @Column(name = "service_start_date")
+    private LocalDate serviceStartDate;
+
+    /**
+     * Date de fin de service.
+     */
+    @Column(name = "service_end_date")
+    private LocalDate serviceEndDate;
+
     /**
      * Constructeur par défaut.
      */
@@ -492,6 +504,22 @@ public class Client extends BaseEntity {
         this.acquisitionSource = acquisitionSource;
     }
 
+    public LocalDate getServiceStartDate() {
+        return serviceStartDate;
+    }
+
+    public void setServiceStartDate(LocalDate serviceStartDate) {
+        this.serviceStartDate = serviceStartDate;
+    }
+
+    public LocalDate getServiceEndDate() {
+        return serviceEndDate;
+    }
+
+    public void setServiceEndDate(LocalDate serviceEndDate) {
+        this.serviceEndDate = serviceEndDate;
+    }
+
     @Override
     public String toString() {
         return "Client{" +
@@ -512,17 +540,22 @@ public class Client extends BaseEntity {
          * Prospect - pas encore client.
          */
         PROSPECT,
-        
+
         /**
          * Client actif.
          */
         ACTIVE,
-        
+
         /**
          * Client inactif.
          */
         INACTIVE,
-        
+
+        /**
+         * Client suspendu.
+         */
+        SUSPENDED,
+
         /**
          * Ancien client.
          */