docs(kit): pin core 1.12.0; chapter 5 teaches progress() and ctx.events.expired

The pin moves from 655fbf3f (1.10.0) to 0a37a44 (1.12.0, website#210),
past 1.11.0 (website#209), which it had skipped. Chapter 5 was read
again for both versions:

- 1.11.0: a thing the game ends on its own schedule is reported with
  ctx.events.expired and filed `expired`, not `orphaned`.
- 1.12.0: an action's optional progress(), the line on a public event
  page. It answers for one reader, cheaply, and costs a line rather
  than the page when it fails. "What to build, in order" gains it as
  step 7.

The template declares neither, so nothing it does changed meaning.
template/module.json's coreApi becomes ^1.12.0 for the equality check.

Checks run at the new pin:

- checkCoreApi, links, rename sites and chapter paths all pass.
- The template's import, swagger, build and externals checks pass.
- Tests pass: server 82, client 20, scripts 10 and 11.
- The template was loaded as `examplegame` into a real core of this
  code through core's own loader, and it registered.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

ci/core-ref.json

@@ -1,9 +1,21 @@
 {
   "repo": "https://gitea.whitlocktech.com/RunicGateway/website.git",
   "branch": "main",
-  "ref": "655fbf3f69a6a1fd650ecbc81afd6cf9c2ad9f66",
+  "ref": "0a37a44164ab107584b918e656651452b50bd4f3",
   "why": [
     "The core this kit is written against, pinned to a commit rather than a branch.",
+    "",
+    "2026-10-06: moved from 655fbf3f (1.10.0) to 0a37a44 (1.12.0, website#210),",
+    "past 1.11.0 (website#209), which this pin had skipped. Chapter 5 was read again",
+    "for both versions and gained two paragraphs:",
+    "- ctx.events.expired (1.11.0): a thing the game ends on its own schedule is",
+    "  `expired`, not `orphaned`;",
+    "- an action's optional progress() (1.12.0): the live line on a public event",
+    "  page, which answers for one reader.",
+    "The template declares neither, and nothing it does changed meaning. The real",
+    "core run below was repeated at this ref.",
+    "",
+    "Before that move:"
     "This one is the EVENT SYSTEM cutover, the commit MODULE_API_VERSION 1.10.0",
     "reached `main` on (website#199), and 1.10.0 is what template/module.json",
     "declares. It moved here from 66bb3b9a (1.9.0, the engagement cutover) because",