fix(HEL-494): 数据中枢独占调度，主网站不再回退旧接口

主网站只向中枢要业务数据；来源选择、切源、补数全部在中枢内部完成，失败不再走东财/腾讯/Tushare 保底。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

config/architecture-inventory.json

@@ -488,8 +488,8 @@
     },
     {
       "path": "backend/data/providers/tushare_industries.py",
-      "bytes": 38757,
-      "lines": 892
+      "bytes": 37168,
+      "lines": 859
     },
     {
       "path": "backend/features/screener/catalog.py",
@@ -503,8 +503,8 @@
     },
     {
       "path": "backend/data/providers/tushare_dashboard.py",
-      "bytes": 34773,
-      "lines": 815
+      "bytes": 33230,
+      "lines": 770
     },
     {
       "path": "database.py",
@@ -591,11 +591,6 @@
       "bytes": 12829,
       "lines": 318
     },
-    {
-      "path": "backend/data/providers/tushare_indices.py",
-      "bytes": 10956,
-      "lines": 248
-    },
     {
       "path": "backend/features/market/insights_auction.py",
       "bytes": 10717,
@@ -616,16 +611,16 @@
       "bytes": 9348,
       "lines": 222
     },
-    {
-      "path": "backend/data/providers/tushare_daily.py",
-      "bytes": 9170,
-      "lines": 233
-    },
     {
       "path": "frontend/pages/market/entity-detail.js",
       "bytes": 9139,
       "lines": 199
     },
+    {
+      "path": "backend/data/providers/tushare_daily.py",
+      "bytes": 9076,
+      "lines": 232
+    },
     {
       "path": "backend/data/providers/tushare_dragon_tiger.py",
       "bytes": 9059,
@@ -636,6 +631,11 @@
       "bytes": 8562,
       "lines": 238
     },
+    {
+      "path": "backend/data/providers/tushare_indices.py",
+      "bytes": 8447,
+      "lines": 189
+    },
     {
       "path": "frontend/pages/mentor/page.html",
       "bytes": 8357,