fix(opencode): pass cache_point_ttl from provider options into transform

Author: bainos

packages/opencode/src/provider/transform.ts

@@ -847,6 +847,10 @@ export function options(input: {
     result["promptCacheKey"] = input.sessionID
   }
 
+  if (input.providerOptions?.cache_point_ttl) {
+    result["cache_point_ttl"] = input.providerOptions.cache_point_ttl
+  }
+
   if (input.model.api.npm === "@ai-sdk/google" || input.model.api.npm === "@ai-sdk/google-vertex") {
     if (input.model.capabilities.reasoning) {
       result["thinkingConfig"] = {