Migrate module path from kyle/ to mc/ org

All import paths updated from git.wntrmute.dev/kyle/mcdsl to
git.wntrmute.dev/mc/mcdsl to match the Gitea organization.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

health/health_test.go

@@ -10,7 +10,7 @@ import (
 
 	"google.golang.org/grpc"
 
-	"git.wntrmute.dev/kyle/mcdsl/db"
+	"git.wntrmute.dev/mc/mcdsl/db"
 )
 
 func TestHandlerHealthy(t *testing.T) {