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-compile/batch.json

@@ -0,0 +1,15 @@
+{
+  "name": "Batch — несколько объектов в одном файле",
+  "input": [
+    { "type": "Enum", "name": "Статусы", "values": ["Новый", "Закрыт"] },
+    { "type": "Catalog", "name": "Валюты" },
+    { "type": "Constant", "name": "ОсновнаяВалюта", "valueType": "CatalogRef.Валюты" }
+  ],
+  "expect": {
+    "files": [
+      "Enums/Статусы.xml",
+      "Catalogs/Валюты.xml",
+      "Constants/ОсновнаяВалюта.xml"
+    ]
+  }
+}