fix: preserve tenant creation metadata and report authority denial

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a07ff8-19d0-7820-b4d0-1353833cb7fc

src/user_engine/adapters/tenant_management.py

@@ -52,6 +52,8 @@ class HTTPTenantManagementAdapter:
                 "tenant_id": tenant,
                 "identifier": tenant,
                 "actor": ACTOR,
+                "display_name": display_name,
+                "correlation_id": correlation_id,
             }).encode(),
             headers={
                 "Authorization": f"Bearer {self.bearer_token}",
@@ -65,12 +67,12 @@ class HTTPTenantManagementAdapter:
             with urlopen(request, timeout=self.timeout) as response:
                 result = json.loads(response.read())
         except HTTPError as exc:
-            exc.read(4096)
             if exc.code == 409:
+                exc.read(4096)
                 return TenantProvisioningResult(
                     tenant=tenant, status="existing", resumed=True, external_ref=tenant,
                 )
-            raise RuntimeError(f"tenant authority failed ({exc.code})") from exc
+            raise self._redacted(exc) from exc
         except URLError as exc:
             raise RuntimeError("tenant authority unavailable") from exc
         return TenantProvisioningResult(