Of course OP isn't trying, in the time-honoured MN putdown, to "make it all about her".
This is about OP constantly taking other people's feelings into account and them not returning the favour. Or god forbid, even celebrating her a bit too, on what's a big deal for her and means precisely zilch to baby birthday girl. But never mind that, just as long as mumzilla doesn't try to hog the limelight by hoping for a decent pic of herself, after a year of sleepless nights and baby rearing.
Why on earth shouldn't she? Don't mothers deserve any special consideration on such an occasion? Is it really the height of selfishness for OP to want one photo of herself that she's happy with? Just how self-erasing do we want mothers to be?
On the other hand OP, I'm sure your guests weren't being deliberately thoughtless. It's just that, unfortunately, people tend to be crap at working these things out for themselves. You not sharing pics will go right over their heads as retribution, and you're gonna find yourself disappointed by their behaviour again and again.
Remember that you're in hyper-mind-reader mode as a mum to 1 year old and other people aren't. Also you might be more sensitive about your new-mum appearance than they realise. So try to cut them some slack.
It's great advice from PPs to make it very clear what you want from a partner, relatives, friends etc. Everyone has different things that really matter to them and there's no shame in saying it out loud. You'll know best how to do it in your own family - my in-laws rip the p* out of each other when it comes to things like photos, and maybe yours is like that - but as a rule I'd avoid anything that could be interpreted as nasty or aggressive.
Either you assert what you want - or you don't, and make peace with the fact you're probably not going to get it. Both approaches are fine. You pick your battles.
The important thing is not to set yourself up for disappointment and resentment. A good life lesson to model to DD.