Add debug logging to Accept delivery

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

infrastructure/ap_inbox_handlers.py

@@ -80,6 +80,8 @@ async def send_accept(
     )
     headers["Content-Type"] = AP_CONTENT_TYPE
 
+    log.info("Accept payload → %s: %s", follower_inbox, json.dumps(accept)[:500])
+
     try:
         async with httpx.AsyncClient(timeout=15) as client:
             resp = await client.post(
@@ -87,7 +89,7 @@ async def send_accept(
                 content=body_bytes,
                 headers=headers,
             )
-            log.info("Accept → %s: %d", follower_inbox, resp.status_code)
+            log.info("Accept → %s: %d %s", follower_inbox, resp.status_code, resp.text[:200])
     except Exception:
         log.exception("Failed to send Accept to %s", follower_inbox)