Restore metadata.yaml

Restores the file removed by the 13:49 sync. The AI Portal needs it to ingest this model; without it the model fails on the next re-ingest. Identical to the version at b840f3a - unchanged filename, size and provenance fields. Worth adding to the local copy the sync mirrors from, so it is not removed again.

metadata.yaml

@@ -0,0 +1,20 @@
+schema_version: 1.0.0
+report_type: llm-generative
+task_type: text-generation
+title: Gemma-4-E2B 8da4w — ExecuTorch
+id: Arm/gemma-4-e2b-text-executorch
+base_model_id: google/gemma-4-E2B
+vendor: Google
+base_model_url: https://huggingface.co/google/gemma-4-E2B
+profile: Arm-Optimized
+weight_dtype: int4
+model_size_mb: 2563.959
+format: executorch
+filename: gemma4_e2b_text_8da4w_emb4.pte
+quantization:
+  method: PTQ-dynamic
+  variant: 8da4w
+  weight_bits: 4
+  activation_bits: 8
+  mode: dynamic
+  weight_granularity: per-group