Match by TVDb ID, not season+episode number

[CollinHeist]

TMDb supports querying by external ID via https://api.themoviedb.org/3/find/{id}, this can prevent false data pulls from TMDb through the interface.

[CollinHeist]

Sonarr does not return the episode TVDb ID in API requests, meaning this would require the user to have an active TVDb subscription (or a change to the Sonarr API, but this issue implies they don't want to change this behavior).

Potential options are:

• Continue matching on season+episode number (which fails relatively frequently)
• Add option for TVDb API key to guarantee matching between datafile episode files and TMDb episode images/translations
• Get Sonarr developers to add this to the API (Unlikely)

However, the series TVDb ID is returned by Sonarr, so can be used to query TMDb for matching the series ID (remove need for manual fixes, and does not use API key)

[CollinHeist]

Opened issue 4921 on the Sonarr GitHub, and they have added the TVDb episode ID to the API requests. Feature should be implemented from there