fix: updated diagrams so it corresponds to the actual implementation

backend/diagrams/movie_database.puml

@@ -2,13 +2,12 @@
 
 entity Movie {
   * id <<UUID>>
-  * id_director <<UUID>>
   ---
   * name: String
   * originalName: String
   * intro: String
-  * picture: String
-  * published: Date
+  picture: String
+  * publishedAt: Number
   * runTimeMinutes: Number
 }
 
@@ -20,8 +19,6 @@ entity Category {
 
 entity MovieCategory {
   * id <<UUID>>
-  * id_movie <<UUID>>
-  * id_category <<UUID>>
   ---
 }
 
@@ -30,7 +27,7 @@ entity Director {
   ---
   * name: String
   * surname: String
-  * birthDate: Date
+  birthDate: Date
 }
 
 Movie }|...|| Director