Thread the season year through a call site that arrived with seed lots

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01H3zbym8Doka2d7D48maSgZ

internal/service/seed_lots_test.go

@@ -461,7 +461,7 @@ func TestCopiedGardenDoesNotInheritSeedLots(t *testing.T) {
 	if err != nil {
 		t.Fatalf("CopyGarden: %v", err)
 	}
-	full, err := s.GardenFull(ctx, owner, copied.ID)
+	full, err := s.GardenFull(ctx, owner, copied.ID, nil)
 	if err != nil {
 		t.Fatalf("GardenFull: %v", err)
 	}