feat(ai-gateway): allow vercel routing for stepfun 3.7 flash free model (#3620)

Co-authored-by: kiloconnect[bot] <240665456+kiloconnect[bot]@users.noreply.github.com>
Co-authored-by: Christiaan Arnoldus <christiaan@kilocode.ai>

Author: kilo-code-bot[bot]

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

@@ -12,7 +12,7 @@ export const stepfun_37_flash_free_model: KiloExclusiveModel = {
   context_length: 262_144,
   max_completion_tokens: 262_144,
   status: 'public',
-  flags: ['reasoning', 'vision'],
+  flags: ['reasoning', 'vision', 'vercel-routing'],
   gateway: 'openrouter',
   internal_id: 'stepfun/step-3.7-flash',
   pricing: null,