RPIP: pDAO Parameter Guardrail Revisions

This is the official disscussion thread for RPIP: pDAO Parameter Guardrail Revisions. Some discord discussion happened in this thread.

This RPIP updates the guardrails for several pDAO parameters to reduce systemic risk and increase flexibility for future governance decisions. It introduces a fixed upper bound on RPL inflation of at most 25% annual inflation, widens the allowed ranges for proposal, veto, and upgrade-veto quorums, removes unnecessary upper limits on the rETH collateral target and megapool dissolution delay, and ties the upper guardrail for the reduced bond parameter directly to the last entry of base_bond_array.

See also RPIP pDAO Parameters and Guardrails for an overview and rationale behind the cantina audit changes.