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When an exception is caught, mark the file as parsed, so we don't try to
parse it again during next run

Simply store every media track as a new record in their respective
tables. There is too much incertainty regarding what we will parse and
whether or not the tracks will appear as different for a single media.

We now consider that an album with 3+ songs with a single unique artist, but
without an album artist tag, is an album from the only artist it
contains.

This changes a bit the way we handle artists:
- We always insert an Artist representation when we find a new one
- We don't fallback to Artist in case AlbumArtist tag isn't set
- We list all artist appearing on an album using Artist entities

This makes all artist, even those appearing as a featuring only in the
artist listing, but this will be fixed in a later commit.

This tries to reduce the operations ordering requirements.

Also, this fixes a cppcheck false positive error about fOut being leaked

While this was working fine, it was actually not waiting for a proper
success signaling. This was clearly a race condition, as was
jeopardizing our error/timeout detection

And update to recent API changes

This fixes a contraint violation exception when trying to handle
multiple tracks, with the language as their only differences.

So that we can save all resources for playback