feat: precipitate grid presentation (row/column/region) into skill contract

scripts/db/display_metadata.py

@@ -9,7 +9,15 @@ from __future__ import annotations
 from typing import Iterable
 
 # 宿主会隐藏这些表，不作为业务表展示（见 jiangchang electron/data-management/types.ts）
-INTERNAL_METADATA_TABLES = frozenset({"_jiangchang_tables", "_jiangchang_columns"})
+# 呈现旁路表由技能按需 CREATE，见 references/CELL_PRESENTATION.md；未建表不影响 P0。
+INTERNAL_METADATA_TABLES = frozenset(
+    {
+        "_jiangchang_tables",
+        "_jiangchang_columns",
+        "_jiangchang_cell_presentation",
+        "_jiangchang_grid_presentation",
+    }
+)
 LEGACY_METADATA_TABLES = frozenset({"_schema_meta"})
 METADATA_TABLES = INTERNAL_METADATA_TABLES | LEGACY_METADATA_TABLES