docs(changelog): record the v1.91.270.0 merge values (GSTA-96)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -28,6 +28,7 @@
 - Lowered: the hoist shrank every tier 2+ SKILL.md by about 22 KB, so the 20 hoisted `maxSkeletonBytes` caps in `test/helpers/carve-guards.ts` drop to the new skeleton plus each one's pre-hoist headroom (ship 81,600 → 59,771), and 42 `eagerPerInvocation` ceilings in `test/fixtures/context-budget.json` ratchet down to the recaptured figures, and after main's v1.91.255.0 merge the new `captain` skill's ceiling goes from 12,011 to 6,551 (hoisted) and five loaded-skill ceilings drop by 2 to 22. No ceiling went up; the four the recapture would have raised keep their old values.
 - Raised after main's v1.91.260.0 merge (#3433 GSTA-92 phase 2 and #3481 review convergence on top of the hoist): each value is the hoisted figure plus the measured growth those PRs added, with no template trim (owner-approved under the parity-caps rule, GSTA-92 Garry "Do it" and GSTA-96 Garry "do it"). Parity caps: ship 1.7172 (322,312 / 187,706), review 1.3136 (142,550 / 108,523), design-review 1.3758 (145,613 / 105,842). Skeleton caps lowered to the hoisted size: ship 82,700 → 60,913 (measured 60,848), design-review 137,767 → 115,947. `eagerPerInvocation` ceilings: ship 15,601 → 15,899, review 15,352 → 15,417, design-review 30,143 → 30,295, cso 4,660 → 4,902, gstack 5,326 → 5,346, capy/skill/gstack 3,498 → 3,899, alwaysOnTotal 7,458 → 7,546, and the new hoisted `ubicloud` row at 3,594. All stay below main's pre-hoist values. The size allowlist keeps the hoisted pins plus the 30 raises #3433 and #3481 made.
 - After main's v1.91.265.0 merge (#3430 /design-motion, #3493 ETHOS principles): `context-budget.json` keeps main's new `design-motion` row at main's value (10,409), raises `eval-plan` by the growth #3493 measured (3,996 → 4,442 tokens; ceiling 4,396 → 4,842, main's own 9,811), and lowers `gstack` back to main's 5,326 (measured 4,863) and `alwaysOnTotal` to 7,542 (measured 7,542).
+- After main's v1.91.270.0 merge (#3494, #3496, #3487): ship's parity cap goes from main's 1.7400 to 1.7432 (327,203 / 187,706), the hoist's raise plus #3487's with no trim. `context-budget.json` is recaptured whole with `bun test/helpers/capture-context-budget.ts`, which replaces the hand-kept rows in the bullet above: every row that rises matches main's own recapture at v1.91.270.0 (`alwaysOnTotal` 7,769, `eval-plan` 4,887, `gstack` 5,350), and `design-motion` drops to 4,724 now that it loads the shared file.
 
 **The Completeness Principle now asks for complete coverage with minimal code.** Every tier-2+ skill's preamble said "the complete thing is the goal", and ETHOS.md told models to "always prefer A" because "the 70-line delta costs seconds". Models read that as permission to write more code, which is the "50-line job arriving as 400" complaint (GSTA-93). Coverage of the requirement is still non-negotiable; code beyond it is no longer a virtue.