refactor: replace inline purgatory sync registration with timer-only approach

Remove the redundant inline kind-30617 registration block from the sync
event loop and the three is_generic/recompute_new_sync_filters_for_relay
calls from confirm_batch error paths. The purgatory announcement sync
timer (run_purgatory_announcement_sync) is now the sole registration path.

Consolidate NGIT_SYNC_BATCH_WINDOW_MS and NGIT_PURGATORY_SYNC_INTERVAL_MS
into a single NGIT_TEST=1 flag that sets both timers to 200ms, replacing
two ad-hoc env vars with one reusable test-mode flag.

0 files changed, 0 insertions, 0 deletions