fix: db was failing under testing

server/internal/store/integration_test.go

@@ -26,6 +26,9 @@ func TestIntegration(t *testing.T) {
 	if err := db.Migrate(ctx); err != nil {
 		t.Fatalf("Migrate failed: %v", err)
 	}
+	if _, err := pool.Exec(ctx, "TRUNCATE users, conversations, messages, contacts, sessions RESTART IDENTITY CASCADE"); err != nil {
+		t.Fatalf("truncate failed: %v", err)
+	}
 
 	// Users
 	u1, err := db.CreateUser(ctx, "user1", "User One", "hash1")