上传OCR切换：小果GLM-OCR-8bit优先，Tesseract降级

MoFin/server.py 的 _ocr_image 改为：
1. 优先调小果 gateway (192.168.1.122:18003) 的 GLM-OCR-8bit
2. 失败/无响应则自动降级到本地 Tesseract（预处理+chi_sim+eng）
3. fallback逻辑保留原预处理管道（放大/锐化/二值化）

ocr_client.py 模块独立可调用，兼作CLI工具

data/price_history.json

@@ -108,7 +108,7 @@
       "date": "2026-06-24",
       "high": 88.32,
       "low": 82.78,
-      "close": 83.83
+      "close": 83.76
     }
   ],
   "00700": [
@@ -836,7 +836,7 @@
       "date": "2026-06-24",
       "high": 145.0,
       "low": 130.0,
-      "close": 142.7
+      "close": 142.9
     }
   ],
   "02388": [
@@ -1004,7 +1004,7 @@
       "date": "2026-06-24",
       "high": 168.6,
       "low": 160.0,
-      "close": 166.7
+      "close": 166.9
     }
   ],
   "06869": [
@@ -1284,7 +1284,7 @@
       "date": "2026-06-24",
       "high": 68.8,
       "low": 65.74,
-      "close": 66.85
+      "close": 66.83
     }
   ],
   "300548": [
@@ -2316,7 +2316,7 @@
       "date": "2026-06-24",
       "high": 745.2,
       "low": 660.01,
-      "close": 713.0
+      "close": 714.88
     }
   ],
   "688802": [
@@ -2466,7 +2466,7 @@
       "date": "2026-06-24",
       "high": 5.38,
       "low": 4.86,
-      "close": 5.09
+      "close": 5.06
     }
   ],
   "688630": [
@@ -2610,7 +2610,7 @@
       "date": "2026-06-24",
       "high": 52.43,
       "low": 49.03,
-      "close": 49.27
+      "close": 49.23
     }
   ],
   "002171": [