chore(release): 0.9.0

[drewstone]

Cuts 0.9.0 for the Breakout ladder (#29), and corrects the 0.8.0 CHANGELOG section.

The correction first. #29's section was written under ## Unreleased, which #28 had already renamed to ## 0.8.0 before #29 landed. The published 0.8.0 tarball therefore does not contain the ladder, but the changelog said it did. That section is moved to ## 0.9.0 here; ## 0.8.0 now lists only what it actually shipped — the achievement/attrition split, the mandatory calibration constructor, and the collapse report.

What 0.9.0 ships. The packaged ALE Breakout contract was derived from a reference reaching score 5 over 210 inputs, so its top achievement was score >= 4 and nothing in it could tell 7 points from 24. Every real player saturated the same three rungs. Re-derived from a predictive paddle controller reaching 76 points over 900 inputs, trimmed to 839; the ladder doubles, with checks at score >= 1, 2, 4, 8, 18, 32, 64, each first passing at a distinct instant.

Measured, seed 0, replay-attested:

control	score @300 / @600	before	after @300	after @600
screen-blind, period ≤ 4	7 / 7	3 of 5	3 of 7	3 of 7
steer from ASCII	6 / 7	3 of 5	3 of 7	3 of 7
steer from RAM	9 / 24	3 of 5	4 of 7	5 of 7

The better player now ranks strictly above the worse one instead of tying it.

Three things left the contract, each on a number: both opaque hash milestones (56 of 96 single-input substitutions satisfy them, family ≥ 5.22e11, and no independent control ever reached that state), life-lost (removing it makes scoreMilestones equal scoreAchievements, so no consumer can pick the number that ranks a dead run above a live one), and a requires chain that only restated an ordering the score already guarantees.

PackagedContract.calibrate passes with no declaration: separates: true, all seven separating, trivial: [], opaque: [], attrition: [], collapses: false.

Consumers holding an attestation against the old contract keep it via makeAle({ game: 'breakout', reference }) with the old reference file.