fix(kiro): canonicalize tool history and route API keys correctly

Route API-key inference through Amazon Q first, enforce adjacent
one-to-one tool use/result pairs after session replay, and treat
payload-invalid HTTP 400 as terminal.

open-sse/providers/registry/kiro.js

@@ -29,7 +29,6 @@ export default {
     headers: {
       "Content-Type": "application/json",
       Accept: "application/vnd.amazon.eventstream",
-      "X-Amz-Target": "AmazonCodeWhispererStreamingService.GenerateAssistantResponse",
       "User-Agent": "AWS-SDK-JS/3.0.0 kiro-ide/1.0.0",
       "X-Amz-User-Agent": "aws-sdk-js/3.0.0 kiro-ide/1.0.0",
     },