feat: deepen skill test coverage — 52 → 247 cases across all 43 skills

Add 195 new test cases covering examples from SKILL.md, edge cases,
and parameter combinations. Create _skill.json for form-edit, skd-edit,
subsystem-edit. Add fixtures for negative validate cases. Fix
normalizeUuids in meta-validate/meta-info configs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/skills/cases/meta-edit/add-ts-attribute.json

@@ -0,0 +1,20 @@
+{
+  "name": "Добавление реквизита к табличной части",
+  "preRun": [
+    {
+      "script": "meta-compile/scripts/meta-compile",
+      "input": {
+        "type": "Document",
+        "name": "Заказ",
+        "tabularSections": { "Товары": ["Номенклатура: CatalogRef.Номенклатура", "Количество: Number(15,3)"] }
+      },
+      "args": { "-JsonPath": "{inputFile}", "-OutputDir": "{workDir}" }
+    }
+  ],
+  "params": { "objectPath": "Documents/Заказ" },
+  "input": {
+    "operations": [
+      { "op": "add-ts-attribute", "ts": "Товары", "name": "Цена", "type": "Number", "length": 15, "precision": 2 }
+    ]
+  }
+}