feat: post-run validation + integration tests for skill pipeline

- runner.mjs v0.4: --with-validation flag runs validators on real output
- postValidate config in 20 _skill.json files (maps skill → validator)
- validatePath in ~100 positive test cases
- skipValidation for 5 cross-reference cases (isolated workspace limitation)
- Integration tests: build-config (19 steps), build-epf (6), build-cfe (4)
- base-config cache from build-config for downstream tests
- Fix chart-of-calculation-types test data (DependenceOnCalculationTypes)
- 285/285 unit + 3/3 integration, all green with validation

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

tests/skills/cases/epf-init/_skill.json

@@ -8,5 +8,6 @@
   "snapshot": {
     "root": "workDir",
     "normalizeUuids": true
-  }
+  },
+  "postValidate": { "script": "epf-validate/scripts/epf-validate", "flag": "-ObjectPath", "pathFrom": "validatePath" }
 }

tests/skills/cases/epf-init/basic.json

@@ -1,6 +1,7 @@
 {
   "name": "Пустая внешняя обработка",
   "params": { "name": "ТестоваяОбработка" },
+  "validatePath": "ТестоваяОбработка",
   "expect": {
     "files": ["ТестоваяОбработка.xml"]
   }

tests/skills/cases/epf-init/latin-name.json

@@ -1,6 +1,7 @@
 {
   "name": "Обработка с латинским именем",
   "params": { "name": "DataLoader" },
+  "validatePath": "DataLoader",
   "expect": {
     "files": ["DataLoader.xml"]
   }

tests/skills/cases/epf-init/minimal.json

@@ -1,6 +1,7 @@
 {
   "name": "Минимальная обработка (короткое имя)",
   "params": { "name": "Тест" },
+  "validatePath": "Тест",
   "expect": {
     "files": ["Тест.xml"]
   }

tests/skills/cases/epf-init/with-synonym.json

@@ -2,6 +2,7 @@
   "name": "Обработка с синонимом",
   "params": { "name": "ЗагрузкаДанных" },
   "args_extra": ["-Synonym", "Загрузка данных из Excel"],
+  "validatePath": "ЗагрузкаДанных",
   "expect": {
     "files": ["ЗагрузкаДанных.xml"]
   }