I see nothing wrong with the structure of the horse that will inhibit it in anything you want to be doing.
If you wish to be jumping 1m or there abouts during eventing, I'd have a look at the angles of her pastern, as they're more upright to that of the hoof angles and will cause strain in the external flexor and in the extensor carpi radialis of the front legs.
She looks like a stayer (not sure what they're referred to in other countries), and that nice rounded and powerful hindquarter will do both of you well in the flat of a cross country course. She has a decent shoulder, probably more upright than it would be sloped, and this will help her shoulder rotate more and end up her tucking her knees in higher, a desirable trait for jumping, but will (generally speaking) make her knee action on the ground flat with little bounce.
Contrary to popular belief in one post above, her neck ties in well although she'll have a low head carriage. Unless worked correctly, she'll naturally (due to conformation) be heavy on the forehand, and corrective farriery for her angles will help with less strain.
Her back isn't that long, I just believe her legs do not match it's length. she may struggle to track up, she may not, I believe she'll be able to engage and stretch her hind legs underneath her easily and this will help with her slightly downhill build. She IS only 3 years old though, she could grow another half a hand by the time she turns 5 years old and even herself up.
She is, over-all, a lovely looking filly that is in a picture that has much to be desired. It's a poor setting up, and you know it as stated, and you could not accurately judge her conformation on just this.
She'll be absolutely perfect for what you want, IF, she is sound of both mind and body after her racing career. Have her vetted before any final decisions are made, especially if that left knee accurately shows what it is like. If she races to the left like a lot of American and eastern Australian horses, this could be a big concern.