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/epf-validate/valid-with-form.json

@@ -0,0 +1,14 @@
+{
+  "name": "Обработка с формой проходит валидацию",
+  "preRun": [
+    {
+      "script": "epf-init/scripts/init",
+      "args": { "-Name": "МояОбработка", "-SrcDir": "{workDir}" }
+    },
+    {
+      "script": "epf-add-form/scripts/add-form",
+      "args": { "-ProcessorName": "МояОбработка", "-FormName": "Форма", "-SrcDir": "{workDir}" }
+    }
+  ],
+  "params": { "objectPath": "МояОбработка.xml" }
+}