5 issues found by review agents and fixed:
1. Intentional deletion guard was at top of process_event, skipping ALL
cleanup (subscription URLs, server counts, expired marking). Moved
check into _handle_user_deleted so cleanup still runs but re-creation
is suppressed via subscription_still_valid=False.
2. Variable shadowing: telegram_id loop var in any() generator shadowed
the outer telegram_id local. Renamed to tid/uid.
3. No hard cap on in-memory dicts: added _MAX_INTENTIONAL_ENTRIES=10000
with early return in mark_intentional_panel_deletion.
4. mark_intentional_panel_deletion called inside for-loop with single
UUID — race window if webhook from first delete arrives before
second UUID is marked. Moved to before the loop with all UUIDs.
5. Tests: @pytest.mark.anyio → @pytest.mark.anyio('asyncio') for
consistency. Replaced process_event(db=None) test with direct
mark+detect unit tests + hard cap test.
Fringg