Add error handling and verification for encodings.py copy operation

adapter.py

@@ -99,8 +99,16 @@ if os.path.exists(encodings_src):
     os.makedirs('ablang2/pretrained_utils', exist_ok=True)
     dst = 'ablang2/pretrained_utils/encodings.py'
     print(f"📋 Copying {encodings_src} to {dst}")
-    shutil.copy2(encodings_src, dst)
-    print("✅ Copied ablang_encodings.py as encodings.py for compatibility")
+    try:
+        shutil.copy2(encodings_src, dst)
+        print("✅ Copied ablang_encodings.py as encodings.py for compatibility")
+        # Verify the copy worked
+        if os.path.exists(dst):
+            print(f"✅ Verified {dst} exists after copy")
+        else:
+            print(f"❌ {dst} does not exist after copy!")
+    except Exception as e:
+        print(f"❌ Error copying file: {e}")
 else:
     print("❌ ablang_encodings.py not found!")