Zac West 4c1854922e
Convert webhook secret to bytes from hex (#2095)
Refs home-assistant/core#67429.

## Summary
Fixes the logic for decryption to use the full key, rather than half of it, when decoding/encoding the additional encryption we use for webhooks only.

## Any other notes
This encryption is largely superfluous in the era of Let's Encrypt's dominance, but we're going to be reusing it for end-to-end encrypted notifications.
2022-03-06 10:18:16 -08:00
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