[PROD] sync appealdocs - better error handling

[szabozoltan69]

Issue

If the appealdocument synchronizing job encounters a document which has not the type in our appealdocumenttype list, it causes an unhandled error. Fortunately the running is not broken, but it should be handled in a more elegant way.

So: instad of this:
DETAIL: Key (type_id)=(1302893) is not present in table "api_appealdocumenttype"
we should give a more silent warning and not polluting the output with 30-rows error messages.
(Only 1302892 and 1302893 was erroneous though.)