Since God's word says ALL have sinned and fallen short of the glory of God, the answer is completely clear.
Does a person have to be aware of what one is doing to commit a sin? Is a baby capable of that?
I think a person does have to be aware of what one is doing to commit a sin, and that a baby is not capable of that.
I also believe that Jesus has a human nature, which would include Him in “all”, but I also believe He did not sin.
Therefore, I think when Paul says “all have sinned”, he is making a generalization.
That is not your interpretation, I understand that, but one that is more than reasonable to me.
“All” does not mean all. Rather it means all those who are responsible, and for Jews, those who are uniquely responsible to keep the Torah. Dogs, cats have not reason, and thus can not sin. Neither do babies. Nor do Gentiles have to keep the Torah. That is why coming of age is at age 13, a time to put away childish things. That is also the reason for different legal systems, to include the Noahide law, which Gentiles are to keep.