refactor(gateway): reorder and restructure llama-3.3-70b model routes in configuration

llm-gateway.yaml

@@ -117,18 +117,6 @@ models:
   #       model: "stepfun/step-3.5-flash:free"
 
   # ═══ TIER 2: Low cost (Groq, Cerebras — free tier with rate limits) ═══
-  - name: "llama-3.3-70b"
-    routes:
-      - provider: groq
-        model: "llama-3.3-70b-versatile"
-        pricing: { input: 0.59, output: 0.79 }
-      - provider: deepinfra
-        model: "meta-llama/Llama-3.3-70B-Instruct-Turbo"
-        pricing: { input: 0.23, output: 0.40 }
-      - provider: cerebras
-        model: "llama-3.3-70b"
-        pricing: { input: 0.85, output: 1.20 }
-
   - name: "llama-3.1-8b"
     routes:
       - provider: groq
@@ -141,6 +129,18 @@ models:
         model: "meta-llama/Meta-Llama-3.1-8B-Instruct"
         pricing: { input: 0.03, output: 0.05 }
 
+  - name: "llama-3.3-70b"
+    routes:
+      - provider: deepinfra
+        model: "meta-llama/Llama-3.3-70B-Instruct-Turbo"
+        pricing: { input: 0.23, output: 0.40 }
+      - provider: groq
+        model: "llama-3.3-70b-versatile"
+        pricing: { input: 0.59, output: 0.79 }
+      - provider: cerebras
+        model: "llama-3.3-70b"
+        pricing: { input: 0.85, output: 1.20 }
+
   - name: "gpt-oss"
     routes:
       - provider: groq