Add event management features to API, including event cancellation, deletion, registration closure, and workflow balance generation. Introduce new roster management endpoints and enhance participant handling with avoided player preferences. Update database schema and service logic to support these changes.

backend/internal/domain/model_test.go

@@ -19,7 +19,7 @@ func TestRatingsAndCaptainInvariants(t *testing.T) {
 }
 
 func TestPlayerPreferenceLimits(t *testing.T) {
-	player := Player{ID: "p1", PreferredRoles: []Role{Tank, Support}, PreferredPlayerIDs: []string{"p2", "p3", "p4"}}
+	player := Player{ID: "p1", PreferredRoles: []Role{Tank, Support}, PreferredPlayerIDs: []string{"p2", "p3", "p4"}, AvoidedPlayerIDs: []string{"p5", "p6", "p7"}}
 	if err := player.ValidatePreferences(); err != nil {
 		t.Fatal(err)
 	}
@@ -27,6 +27,15 @@ func TestPlayerPreferenceLimits(t *testing.T) {
 	if err := player.ValidatePreferences(); err == nil {
 		t.Fatal("expected teammate preference limit")
 	}
+	player.PreferredPlayerIDs = []string{"p2"}
+	player.AvoidedPlayerIDs = append(player.AvoidedPlayerIDs, "p8")
+	if err := player.ValidatePreferences(); err == nil {
+		t.Fatal("expected avoided teammate limit")
+	}
+	player.AvoidedPlayerIDs = []string{"p2"}
+	if err := player.ValidatePreferences(); err == nil {
+		t.Fatal("expected preferred/avoided overlap rejection")
+	}
 }
 
 func TestSeriesBestOfThree(t *testing.T) {