FEAT : Ajout du mécanisme d'album avec partage et visibilité

src/main/java/local/epul4a/fotosharing/model/Album.java

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+package local.epul4a.fotosharing.model;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+@Getter
+@Setter
+public class Album {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private String nom;
+
+    @Column(length = 1000)
+    private String description;
+
+    @ManyToOne(optional = false)
+    private Utilisateur proprietaire;
+
+    private LocalDateTime dateCreation;
+
+    @Enumerated(EnumType.STRING)
+    @Column(nullable = false)
+    private Visibilite visibilite;
+
+    @ManyToMany
+    @JoinTable(
+            name = "album_photo",
+            joinColumns = @JoinColumn(name = "album_id"),
+            inverseJoinColumns = @JoinColumn(name = "photo_id")
+    )
+    private Set<Photo> photos = new HashSet<>();
+
+    @OneToMany(mappedBy = "album", cascade = CascadeType.ALL, orphanRemoval = true)
+    private Set<Partage> partages = new HashSet<>();
+
+
+    public enum Visibilite {
+        PRIVATE,
+        SHARED,
+        PUBLIC
+    }
+}