BAI-3: harden live readiness diagnostics

Co-authored-by: multica-agent <github@multica.ai>

app/config/architecture-inventory.json

@@ -609,16 +609,16 @@
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       "path": "backend/data/providers/tushare_daily.py",
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       "path": "backend/features/market/insights_popularity.py",
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@@ -829,11 +829,6 @@
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-      "path": "backend/features/system/routes.py",
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     {
       "path": "backend/features/themes/routes.py",
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@@ -844,6 +839,11 @@
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       "lines": 30
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+    {
+      "path": "backend/features/system/routes.py",
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+      "lines": 32
+    },
     {
       "path": "frontend/pages/ladder/page.html",
       "bytes": 1143,