feat(backend): Ajout complet des fonctionnalités Chat, Social, Story et Notifications

Implémentation complète de toutes les fonctionnalités backend :

## Nouvelles Fonctionnalités

### Chat (Messagerie Instantanée)
- Entities : Conversation, Message
- DTOs : ConversationResponseDTO, MessageResponseDTO, SendMessageRequestDTO
- Resources : MessageResource (endpoints REST)
- Services : MessageService (logique métier)
- Repositories : ConversationRepository, MessageRepository
- WebSocket : ChatWebSocket (temps réel)

### Social (Publications Sociales)
- Entities : SocialPost, SocialComment, SocialLike
- DTOs : SocialPostResponseDTO, CreateSocialPostRequestDTO
- Resources : SocialPostResource
- Services : SocialPostService
- Repositories : SocialPostRepository

### Story (Stories temporaires)
- Entities : Story, StoryView
- DTOs : StoryResponseDTO, CreateStoryRequestDTO
- Resources : StoryResource
- Services : StoryService
- Repositories : StoryRepository

### Notifications (Temps Réel)
- Entities : Notification
- DTOs : NotificationResponseDTO
- Resources : NotificationResource
- Services : NotificationService, PresenceService
- Repositories : NotificationRepository
- WebSocket : NotificationWebSocket (temps réel)

## Améliorations

### Users & Friendship
- Mise à jour UserResponseDTO avec nouveaux champs
- Amélioration FriendshipResource avec séparation demandes envoyées/reçues
- FriendSuggestionResponseDTO pour suggestions d'amis
- Optimisations dans UsersService et FriendshipService

### Events
- Améliorations EventsResource et EventService
- Optimisations EventsRepository

### Configuration
- Mise à jour application.properties
- Configuration docker-compose.yml
- Dockerfile pour développement

## Fichiers Modifiés
- .dockerignore, .gitignore
- README.md
- docker-compose.yml
- Configuration Maven wrapper

.mvn/wrapper/MavenWrapperDownloader.java

@@ -21,77 +21,72 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.Authenticator;
 import java.net.PasswordAuthentication;
+import java.net.URI;
 import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
+import java.util.concurrent.ThreadLocalRandom;
 
-public final class MavenWrapperDownloader
-{
-    private static final String WRAPPER_VERSION = "3.2.0";
+public final class MavenWrapperDownloader {
+    private static final String WRAPPER_VERSION = "3.3.2";
 
-    private static final boolean VERBOSE = Boolean.parseBoolean( System.getenv( "MVNW_VERBOSE" ) );
+    private static final boolean VERBOSE = Boolean.parseBoolean(System.getenv("MVNW_VERBOSE"));
 
-    public static void main( String[] args )
-    {
-        log( "Apache Maven Wrapper Downloader " + WRAPPER_VERSION );
+    public static void main(String[] args) {
+        log("Apache Maven Wrapper Downloader " + WRAPPER_VERSION);
 
-        if ( args.length != 2 )
-        {
-            System.err.println( " - ERROR wrapperUrl or wrapperJarPath parameter missing" );
-            System.exit( 1 );
+        if (args.length != 2) {
+            System.err.println(" - ERROR wrapperUrl or wrapperJarPath parameter missing");
+            System.exit(1);
         }
 
-        try
-        {
-            log( " - Downloader started" );
-            final URL wrapperUrl = new URL( args[0] );
-            final String jarPath = args[1].replace( "..", "" ); // Sanitize path
-            final Path wrapperJarPath = Paths.get( jarPath ).toAbsolutePath().normalize();
-            downloadFileFromURL( wrapperUrl, wrapperJarPath );
-            log( "Done" );
-        }
-        catch ( IOException e )
-        {
-            System.err.println( "- Error downloading: " + e.getMessage() );
-            if ( VERBOSE )
-            {
+        try {
+            log(" - Downloader started");
+            final URL wrapperUrl = URI.create(args[0]).toURL();
+            final String jarPath = args[1].replace("..", ""); // Sanitize path
+            final Path wrapperJarPath = Paths.get(jarPath).toAbsolutePath().normalize();
+            downloadFileFromURL(wrapperUrl, wrapperJarPath);
+            log("Done");
+        } catch (IOException e) {
+            System.err.println("- Error downloading: " + e.getMessage());
+            if (VERBOSE) {
                 e.printStackTrace();
             }
-            System.exit( 1 );
+            System.exit(1);
         }
     }
 
-    private static void downloadFileFromURL( URL wrapperUrl, Path wrapperJarPath )
-        throws IOException
-    {
-        log( " - Downloading to: " + wrapperJarPath );
-        if ( System.getenv( "MVNW_USERNAME" ) != null && System.getenv( "MVNW_PASSWORD" ) != null )
-        {
-            final String username = System.getenv( "MVNW_USERNAME" );
-            final char[] password = System.getenv( "MVNW_PASSWORD" ).toCharArray();
-            Authenticator.setDefault( new Authenticator()
-            {
+    private static void downloadFileFromURL(URL wrapperUrl, Path wrapperJarPath)
+            throws IOException {
+        log(" - Downloading to: " + wrapperJarPath);
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            final String username = System.getenv("MVNW_USERNAME");
+            final char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
                 @Override
-                protected PasswordAuthentication getPasswordAuthentication()
-                {
-                    return new PasswordAuthentication( username, password );
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
                 }
-            } );
+            });
         }
-        try ( InputStream inStream = wrapperUrl.openStream() )
-        {
-            Files.copy( inStream, wrapperJarPath, StandardCopyOption.REPLACE_EXISTING );
+        Path temp = wrapperJarPath
+                .getParent()
+                .resolve(wrapperJarPath.getFileName() + "."
+                        + Long.toUnsignedString(ThreadLocalRandom.current().nextLong()) + ".tmp");
+        try (InputStream inStream = wrapperUrl.openStream()) {
+            Files.copy(inStream, temp, StandardCopyOption.REPLACE_EXISTING);
+            Files.move(temp, wrapperJarPath, StandardCopyOption.REPLACE_EXISTING);
+        } finally {
+            Files.deleteIfExists(temp);
         }
-        log( " - Downloader complete" );
+        log(" - Downloader complete");
     }
 
-    private static void log( String msg )
-    {
-        if ( VERBOSE )
-        {
-            System.out.println( msg );
+    private static void log(String msg) {
+        if (VERBOSE) {
+            System.out.println(msg);
         }
     }
 

.mvn/wrapper/maven-wrapper.properties

@@ -14,5 +14,7 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.7/apache-maven-3.9.7-bin.zip
-wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar
+wrapperVersion=3.3.2
+distributionType=source
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.9/apache-maven-3.9.9-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.3.2/maven-wrapper-3.3.2.jar