fix typecheck for evals

Author: charleslien

evals/impl/agent-runtime.ts

@@ -1,3 +1,5 @@
+import { success } from '@codebuff/common/util/error'
+
 import type { AgentTemplate } from '@codebuff/common/types/agent-template'
 import type { AgentRuntimeDeps } from '@codebuff/common/types/contracts/agent-runtime'
 
@@ -13,6 +15,13 @@ export const EVALS_AGENT_RUNTIME_IMPL = Object.freeze<AgentRuntimeDeps>({
   finishAgentRun: async () => {},
   addAgentStep: async () => 'test-agent-step-id',
 
+  // Backend
+  consumeCreditsWithFallback: async () => {
+    return success({
+      chargedToOrganization: false,
+    })
+  },
+
   // LLM
   promptAiSdkStream: async function* () {
     throw new Error('promptAiSdkStream not implemented in eval runtime')