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-validate/valid-document.json

@@ -0,0 +1,17 @@
+{
+  "name": "Корректный документ проходит валидацию",
+  "setup": "empty-config",
+  "preRun": [
+    {
+      "script": "meta-compile/scripts/meta-compile",
+      "input": {
+        "type": "Document",
+        "name": "ПриходнаяНакладная",
+        "attributes": ["Склад: String(100)"],
+        "tabularSections": { "Товары": ["Номенклатура: String(150)", "Количество: Number(15,3)"] }
+      },
+      "args": { "-JsonPath": "{inputFile}", "-OutputDir": "{workDir}" }
+    }
+  ],
+  "params": { "objectPath": "Documents/ПриходнаяНакладная" }
+}