Relax tensorSpec.name to optional

config.schema.json

@@ -140,10 +140,14 @@
     },
     "tensorSpec": {
       "type": "object",
-      "required": ["name", "shape", "dtype"],
+      "required": ["shape", "dtype"],
       "additionalProperties": false,
       "properties": {
-        "name": { "type": "string", "minLength": 1 },
+        "name": {
+          "type": "string",
+          "minLength": 1,
+          "description": "Optional. Executorch .pte files do not carry user-meaningful tensor names; introspected configs use positional `input_N`/`output_N` keys via the array order instead and omit `name`. Set this when a hand-curated semantic name is available."
+        },
         "shape": {
           "type": "array",
           "items": { "type": "integer" },