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/mxl-compile/_skill.json

@@ -9,5 +9,10 @@
   "snapshot": {
     "root": "workDir",
     "normalizeUuids": false
+  },
+  "postValidate": {
+    "script": "mxl-validate/scripts/mxl-validate",
+    "flag": "-TemplatePath",
+    "pathFrom": "validatePath"
   }
 }

tests/skills/cases/mxl-compile/column-widths.json

@@ -24,6 +24,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/empty-rows.json

@@ -31,6 +31,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/format-strings.json

@@ -34,6 +34,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/merged-cells.json

@@ -40,6 +40,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/minimal.json

@@ -12,6 +12,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/multiple-areas.json

@@ -57,6 +57,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/page-a4-landscape.json

@@ -41,6 +41,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/parameters-and-templates.json

@@ -37,6 +37,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/print-form.json

@@ -102,6 +102,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/simple-template.json

@@ -12,6 +12,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }

tests/skills/cases/mxl-compile/styles-fonts-borders.json

@@ -86,6 +86,7 @@
     ]
   },
   "params": { "outputPath": "Template.xml" },
+  "validatePath": "Template.xml",
   "expect": {
     "files": ["Template.xml"]
   }