chore: renumber v1.56.0.0 -> v1.59.0.0 (reserve a later landing slot)

Bumps VERSION, package.json, and the CHANGELOG header. Leaves 1.57/1.58 free
for PRs that land first; this branch claims 1.59.0.0 to land later.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## [1.56.0.0] - 2026-05-31
+## [1.59.0.0] - 2026-05-31
 
 ## **`/land` is a standalone skill now, and on a merge queue it's fire-and-forget: enqueue a stack of green PRs, walk away, and the queue lands them all on the base branch.**
 

VERSION

@@ -1 +1 @@
-1.56.0.0
+1.59.0.0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gstack",
-  "version": "1.56.0.0",
+  "version": "1.59.0.0",
   "description": "Garry's Stack — Claude Code skills + fast headless browser. One repo, one install, entire AI engineering workflow.",
   "license": "MIT",
   "type": "module",