chore(release): 1.1.0

Supersedes the 1.0.x release commits on this branch. Those were held back
on the grounds that a v1.1.0 git tag already existed - which was wrong: the
three local tags (v1.0.0, v1.1.0, v1.1.1) were never pushed, and the remote
has no tags at all, so nothing was actually taken.

Minor is the correct bump. Requests that previously failed now succeed -
duplicate chain links are accepted, and validation responses carry a
per-field errors[] array - which is backward-compatible new behaviour
rather than a fix alone.

Both repos are set to 1.1.0 so the pair stays aligned. Still no tag; the
stale local-only tags are worth deleting to avoid confusing `git describe`.

CHANGELOG.md

@@ -5,11 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-> History prior to 1.0.2 has not yet been backfilled from git.
+> History prior to 1.1.0 has not yet been backfilled from git.
 
 ## [Unreleased]
 
-## [1.0.2] - 2026-09-09
+## [1.1.0] - 2026-09-09
 
 ### Fixed
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "frontend-temp",
   "private": true,
-  "version": "1.0.2",
+  "version": "1.1.0",
   "type": "module",
   "license": "MIT",
   "author": "Kevin Riehl",