Replace structured LLM dependency with Audita adapter

internal/framework/llm/dependency_guard_test.go

@@ -0,0 +1,25 @@
+package llm
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+func TestModuleDoesNotReferenceInstructorGo(t *testing.T) {
+	_, file, _, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatalf("runtime caller lookup failed")
+	}
+	repoRoot := filepath.Clean(filepath.Join(filepath.Dir(file), "..", "..", ".."))
+
+	modBytes, err := os.ReadFile(filepath.Join(repoRoot, "go.mod"))
+	if err != nil {
+		t.Fatalf("read go.mod: %v", err)
+	}
+	if strings.Contains(string(modBytes), "github.com/jxnl/instructor-go") {
+		t.Fatalf("unexpected instructor-go reference in go.mod")
+	}
+}