feat(iios): email adapter dedup fix + smoke + verification

Adds adapter-owned externalEventId extraction to the ChannelAdapter contract (WebhookAdapter→eventId, EmailAdapter→Message-ID) and uses it in InboundService, so email replays dedup on Message-ID (previously only payload.eventId worked). Adds an email-dedup spec + smoke-email.mjs proving inbound → normalized, a reply joins the same email thread, bad signature rejected, and outbound EMAIL SENT. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-03 20:34:26 +05:30
parent f0afca89e3
commit f0ea1ca553
6 changed files with 113 additions and 1 deletions
@@ -43,6 +43,11 @@ export class EmailAdapter implements ChannelAdapter {
    return hmacVerify(rawBody, secret, typeof sig === 'string' ? sig : undefined);
  }

+  externalEventId(payload: unknown): string | undefined {
+    const id = (payload as EmailInboundPayload)?.messageId;
+    return typeof id === 'string' ? id : undefined;
+  }
+
  normalize(payload: unknown, ctx: NormalizeContext): IngestInteractionRequest {
    const p = payload as EmailInboundPayload;
    // A reply's thread root is the first Message-ID in its chain → same IIOS thread as the original.