feat(1d): enroll hedgedoc in bridge POLL_REPOS (DG6 unconfigured-recipe target)

hedgedoc mirrored to recipe-maintainers/hedgedoc with probe PR #1; add it to the bridge poll list so
!testme triggers the full generic suite (no cc-ci/repo-local overlay -> pure generic). Rebuild pending.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/keycloak/test_backup.py

@@ -22,6 +22,11 @@ def test_backup_captures_state(live_app, meta):
     snap = generic.do_backup(domain)
     assert snap, "backup produced no snapshot artifact"
 
+    # backup-bot-two cycles the keycloak container during backup, so the admin API is briefly 502.
+    # Wait for it to be serving again, then re-auth, before mutating via the HTTP admin API.
+    generic.assert_serving(domain, meta)
+    tok = kc_admin.admin_token(domain, pw)
+
     # 2) mutate: delete the realm (diverge from the backup)
     assert kc_admin.delete_marker_realm(domain, tok) in (204, 200)
     assert not kc_admin.marker_realm_exists(domain, tok), "delete did not take"