Добавлен поиск паттернов в прошлых стримах

src/main/java/ru/serega6531/packmate/model/Stream.java

@@ -6,6 +6,7 @@ import org.hibernate.annotations.GenericGenerator;
 import ru.serega6531.packmate.model.enums.Protocol;
 
 import javax.persistence.*;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
@@ -40,8 +41,8 @@ public class Stream {
 
     private long endTimestamp;
 
-    @ManyToMany(cascade = CascadeType.ALL)
-    private Set<Pattern> foundPatterns;
+    @ManyToMany
+    private Set<Pattern> foundPatterns = new HashSet<>();
 
     private boolean favorite;