Constant value dedup may delay circuit vkey convergence point for recursive aggregation

[lanbones]

Currently, the aggregator circuits' vkey is convergent for recursive aggregation. (The vkey can be the same after the 2nd aggregation).
There is a corner case that may delay the convergent point when constant dedup is enabled. It is caused by different dedup positions (between the 2nd aggregation and 3rd aggregation), and results in the change of permutation and constant value hash size.
I won't fix it soon, because it is not a security bug and the circuit size would be slightly larger without dedup. But if anyone suffers from this issue, we can fix it by removing the dedup.

halo2aggregator-s/src/api/ast_eval.rs

Lines 279 to 286 in 00829f5

	for (i, p) in self.const_points.iter().enumerate() {
	if p == c {
	pos = i;
	}
	}
	if pos == self.const_points.len() {
	self.const_points.push(*c);
	}

halo2aggregator-s/src/api/ast_eval.rs

Lines 191 to 198 in 00829f5

	for (i, s) in self.const_scalars.iter().enumerate() {
	if s == x {
	pos = i;
	}
	}
	if pos == self.const_scalars.len() {
	self.const_scalars.push(*x);
	}