The security review moves from Next Step to Completed Steps, saying what it
read (the tree at 99292b9), that its ten findings are filed and fixed on next,
which owner decisions it raised are still open, and what it did not cover.
Next Step takes the one Future Steps item, cutting 1.0.0 once the milestone is
empty. Status drops a dated gate result and links the current milestone PR.
Model: opus-5-5