Nomad changes

fixtures/smoke/image_png.json

@@ -0,0 +1,24 @@
+{
+  "id": "smoke_image_png",
+  "category": "smoke",
+  "description": "Smoke test: PNG image (without OCR, metadata only)",
+  "tags": ["smoke", "image", "png"],
+  "input": {
+    "path": "images/sample.png",
+    "media_type": "image/png",
+    "config": {
+      "disable_ocr": true
+    }
+  },
+  "assertions": [
+    {
+      "type": "equals",
+      "field": "mime_type",
+      "value": "image/png"
+    }
+  ],
+  "skip": {
+    "languages": ["wasm"],
+    "reason": "WASM cannot access filesystem; use extractBytes with file content instead"
+  }
+}