Enable Step 3.7 free model (#3605)

Author: chrarnoldus

apps/web/src/lib/ai-gateway/providers/stepfun.ts

@@ -11,7 +11,7 @@ export const stepfun_37_flash_free_model: KiloExclusiveModel = {
     "Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters per token. The model supports a 256K context window and exposes selectable reasoning levels (high/medium/low), letting callers trade off speed, cost, and depth of reasoning.\n\nDesigned for coding, agentic workflows, structured outputs, and long-context productivity tasks.",
   context_length: 262_144,
   max_completion_tokens: 262_144,
-  status: 'disabled',
+  status: 'public',
   flags: ['reasoning', 'vision'],
   gateway: 'openrouter',
   internal_id: 'stepfun/step-3.7-flash',