Write congratulations that don't sound envious or flat

Write congratulations for this news.

News: [details]
Who: [name]
My honest feeling if mixed: [optional — for private vent only]
Channel: [text / card / social]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. A clean sendable congratulations.
2. A private vent version I will not send, if I shared mixed feelings.
3. What to leave out (making it about me, fake over-the-top).
4. A follow-up question that shows interest without prying.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent facts, quotes or what the other person thinks. Give a sendable version and, when I've pasted a vent, a one-line note on what you left out and why. This is help with wording, not legal advice. UK English.

Stay in this ChatGPT chat. Do not turn on apps or connectors, and do not use memory from another chat.