Core/Professions: Player must play an emote when discovered new transmutation (recipe or incription?)

All emotes are here:

SELECT * FROM broadcast_text WHERE TEXT LIKE '%discovery!  %'

The thing is I don't know why these are not used in WotLK:

SELECT * FROM broadcast_text WHERE TEXT LIKE '%discovery!  %' AND id BETWEEN 12440 AND 29999

I found WotLK videos and screenshots only with 'DISCOVERY! $n has discovered a new transmutation!'
And nothing related to DISCOVERY! $n has discovered a new inscription!
Or to DISCOVERY! $n has discovered a new recipe!

335 Alchemy transmutations:
https://youtu.be/tw_Sy3ldH_E?t=112
https://idtankthat.com/wp-content/uploads/2011/03/5-kings-amber.png
https://i.imgur.com/XGc2ce6.png

TBC Alchemy transmutations / potions / flasks:
https://wow.zamimg.com/uploads/screenshots/normal/21020-.jpg
https://wow.gamepedia.com/File:Alchdiscovery.jpg
https://wow.zamimg.com/uploads/screenshots/normal/21905-.jpg
https://ardentdefense.wordpress.com/2007/10/08/alchemy-new-discovery/
https://potshot.files.wordpress.com/2008/04/disco4.jpg?w=362
https://potshot.files.wordpress.com/2008/04/disco3.jpg?w=383
https://1.bp.blogspot.com/_zDsXVCRDCxE/R0lDGN-8CeI/AAAAAAAAAM4/U1jDuRGh9Aw/s400/discovery4.jpg

Branch: 3.3.5
TC rev. hash/commit: 32aebc14abbb

Start by checking the broadcast_text rows returned by the issue's discovery queries on the 3.3.5 branch, then trace the profession discovery handling for transmutations, recipes, and inscriptions. The issue names no source files or tests; done means confirming the intended WotLK behavior and ensuring the appropriate discovery emote is played for each applicable profession result.