Add voucher events

[ufozone]

In my production system I get the following warnings in the log when I use my voucher integration:

2024-05-05 21:14:26.557 WARNING (MainThread) [aiounifi.models.event] Unsupported event key EVT_AD_VoucherCreated
2024-05-05 21:14:26.557 WARNING (MainThread) [aiounifi.models.event] Unsupported event {'num': '1', 'use': 'single-use', 'admin': 'Admin[Admin  ]', 'site_id': '5a32aa4ee4b0412345678910', 'is_admin': True, 'key': 'EVT_AD_VoucherCreated', 'subsystem': 'wlan', 'is_negative': False, 'time': 1714936463552, 'datetime': '2024-05-05T19:14:23Z', 'msg': 'Admin[Admin  ] created 1 single-use voucher(s)', '_id': '6637da8ff30c710b60b18251'}
2024-05-05 21:16:11.559 WARNING (MainThread) [aiounifi.models.event] Unsupported event key EVT_AD_VoucherDeleted
2024-05-05 21:16:11.560 WARNING (MainThread) [aiounifi.models.event] Unsupported event {'code': '9668964319', 'admin': 'Admin[Admin  ]', 'site_id': '5a32aa4ee4b0412345678910', 'is_admin': True, 'key': 'EVT_AD_VoucherDeleted', 'subsystem': 'wlan', 'is_negative': False, 'time': 1714936570825, 'datetime': '2024-05-05T19:16:10Z', 'msg': 'Voucher[9668964319] was deleted', '_id': '6637dafaf30c710b60b182b6'}

I can't reproduce it on a dev system, so I can't really debug it.

But I hope that the warnings will disappear as a result of the changes made. What do you say, @Kane610 ?

[Kane610]

Thanks, yes that should fix those logs