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/accumulation-register.json

@@ -0,0 +1,13 @@
+{
+  "name": "Регистр накопления остатков",
+  "input": {
+    "type": "AccumulationRegister",
+    "name": "ОстаткиТоваров",
+    "registerType": "Balance",
+    "dimensions": ["Номенклатура: CatalogRef.Номенклатура", "Склад: CatalogRef.Склады"],
+    "resources": ["Количество: Number(15,3)"]
+  },
+  "expect": {
+    "files": ["AccumulationRegisters/ОстаткиТоваров.xml", "AccumulationRegisters/ОстаткиТоваров/Ext/RecordSetModule.bsl"]
+  }
+}