Enrich per-event RST/VCC labels (ATR STARTS / power-up) + decode server-side

- decode_line_event adds human label: RST de-asserted->ATR STARTS,
  VCC applied->VCC ON (power-up); keep canonical event string
- Enable rst/vcc in DB decode dispatch so PWA receives decoded
  (fixes bare RESET/VCC fallback and a latent showDetail crash)
- PWA line_event_label/showDetail render decoded.label
- Bump 1.22.1, SW cache v32->v33; +1 test

simtrace2_pysniff/server/database.py

@@ -230,7 +230,7 @@ class Database:
             'data': data_blob.hex(),
             'flags': flags,
         }
-        if row[3] in ('tpdu', 'change', 'fidi', 'atr', 'pps'):
+        if row[3] in ('tpdu', 'change', 'fidi', 'atr', 'pps', 'rst', 'vcc'):
             try:
                 from .decode import decode_sniff_msg
                 msg['decoded'] = decode_sniff_msg(data_blob, row[3], flags, prev=prev)