Add Z.ai GLM 4.7 model to Cerebras provider

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

core/model_capabilities.py

@@ -143,6 +143,17 @@ MODEL_CAPABILITIES: dict[str, ModelCapabilities] = {
         speed="slow",
         priority=85,
     ),
+    "cerebras/z-ai/glm4.7": ModelCapabilities(
+        provider_id="cerebras",
+        model_id="z-ai/glm4.7",
+        model_ref="cerebras/z-ai/glm4.7",
+        coding=True,
+        reasoning=True,
+        general_text=True,
+        max_tokens=32000,
+        speed="medium",
+        priority=80,
+    ),
     # Silicon Flow models
     "silicon/Qwen/Qwen3.6-35B-A3B": ModelCapabilities(
         provider_id="silicon",