feat: add candidate FreeCAD naming SDK and attachment oracles

Build and verify the candidate-only FreeCAD naming bridge and OCCT worker path, including three-stage StringHasher restoration. Add Datum, ShapeBinder, attachment-mode, and PartDesign structure oracles plus offline SDK build plans and CI boundary checks.

native/freecad-naming-probe/shims/App/Application.h

@@ -0,0 +1,41 @@
+#ifndef SRC_APP_APPLICATION_H_
+#define SRC_APP_APPLICATION_H_
+
+#include <set>
+#include <string>
+
+namespace App {
+
+class Document;
+
+class ProbeSignal
+{
+public:
+    template<typename Callback>
+    void connect(Callback&&)
+    {}
+};
+
+class Application
+{
+public:
+    Document* getActiveDocument() const
+    {
+        return nullptr;
+    }
+
+    ProbeSignal signalStartSaveDocument;
+    ProbeSignal signalFinishSaveDocument;
+    ProbeSignal signalStartRestoreDocument;
+    ProbeSignal signalFinishRestoreDocument;
+};
+
+inline Application& GetApplication()
+{
+    static Application application;
+    return application;
+}
+
+}  // namespace App
+
+#endif

native/freecad-naming-probe/shims/App/Document.h

@@ -0,0 +1,19 @@
+#ifndef SRC_APP_DOCUMENT_H_
+#define SRC_APP_DOCUMENT_H_
+
+#include <App/DocumentObject.h>
+
+namespace App {
+
+class Document
+{
+public:
+    DocumentObject* getObjectByID(long) const
+    {
+        return nullptr;
+    }
+};
+
+}  // namespace App
+
+#endif

native/freecad-naming-probe/shims/App/DocumentObject.h

@@ -0,0 +1,31 @@
+#ifndef SRC_APP_DOCUMENTOBJECT_H_
+#define SRC_APP_DOCUMENTOBJECT_H_
+
+#include <string>
+
+namespace App {
+
+class DocumentObject
+{
+public:
+    explicit DocumentObject(long id = 0)
+        : objectId(id)
+    {}
+
+    long getID() const
+    {
+        return objectId;
+    }
+
+    std::string getFullName() const
+    {
+        return "ProbeObject";
+    }
+
+private:
+    long objectId;
+};
+
+}  // namespace App
+
+#endif

native/freecad-naming-probe/shims/App/StringHasher.h

@@ -1,27 +0,0 @@
-#pragma once
-
-#define APP_STRING_ID_H
-
-#include <QByteArray>
-
-namespace App
-{
-class StringIDRef
-{
-public:
-    void toBytes(QByteArray& bytes) const
-    {
-        bytes.clear();
-    }
-
-    bool operator<(const StringIDRef&) const
-    {
-        return false;
-    }
-
-    bool operator==(const StringIDRef&) const
-    {
-        return true;
-    }
-};
-}  // namespace App