feat: 도매상 API 통합 및 스키마 업데이트

- wholesale 패키지 연동 (SooinSession, GeoYoungSession)
- Flask Blueprint 분리 (sooin_api.py, geoyoung_api.py)
- order_context 스키마 확장 (wholesaler_id, internal_code 등)
- 수인약품 개별 취소 기능 (cancel_item, restore_item)
- 문서 추가: WHOLESALE_API_INTEGRATION.md
- 테스트 스크립트들

backend/test_del3.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+from sooin_api import SooinSession
+import re
+
+session = SooinSession()
+session.login()
+
+resp = session.session.get('http://sooinpharm.co.kr/Service/Order/Bag.asp?currVenCd=50911')
+html = resp.text
+
+# 모든 <a> 태그의 href와 onclick 찾기
+links = re.findall(r'<a[^>]*(href|onclick)=["\']([^"\']+)["\'][^>]*>', html)
+for attr, val in links:
+    if 'del' in val.lower() or 'cancel' in val.lower():
+        print(f'{attr}: {val[:100]}')
+
+print('\n--- form actions ---')
+forms = re.findall(r'<form[^>]*action=["\']([^"\']+)["\']', html)
+for f in forms:
+    print(f'form action: {f}')
+
+print('\n--- hidden inputs ---')
+hiddens = re.findall(r'<input[^>]*type=["\']hidden["\'][^>]*name=["\']([^"\']+)["\'][^>]*value=["\']([^"\']*)["\']', html)
+for name, val in hiddens[:10]:
+    print(f'{name}: {val}')