[feature] favicon saver - support for inline favicons #3891
Description
Since the fetchers already try to get the favicon by base64 anyway, sometimes its already encoded as such.
2026-02-17 12:19:27.212 | ERROR | changedetectionio.model.Watch:bump_favicon:802 - UUID: 5d4dfaef-15dc-40c5-85e2-0c9f11fe9a45 Cant work out file extension from 'data:image/png;base64,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'