chore: prepare the 2.2.0 release (#660)

Bumps every version surface to 2.2.0, fixes a latent version-coupling bug in the
OCR runtime tests, and stops an absent GPU runner from silently stalling a
release.

Version surfaces: scripts/sync-version.sh covers the 11 workspaces, APP_VERSION,
and the docs release commands across all locales. Root package.json plus the
three surfaces the script never reaches are done by hand: the DOCKERHUB.md banner
and tag table, the docker-tags.md pinning table in 21 locales, and the example
runtimeVersion in tools/image/ocr.md in 21 locales. The release-notes archive step
is deliberately not pre-run, so the notes text stays editable until the release.

Latent bug: runtime-state rejects any runtime whose compatibility.snapotterVersion
is not exactly APP_VERSION, and five fixtures pinned the literal 2.1.0. Since
semantic-release rewrites APP_VERSION on every release, the first PR after any
bump would have gone red for a reason nobody would trace to the release. The
fixtures now derive from APP_VERSION.

GPU runner: sign-ocr-index needs verify-ocr-nvidia on self-hosted hardware, and
the gated manifest job needs ai-bundles, so a missing runner queued instead of
failing and produced no image tags. preflight-gpu-runner claims the same labels
with no dependencies, so it is scheduled first and validates the GPU before the
90-minute build. An API preflight is impossible because listing self-hosted
runners needs Administration:read, which GITHUB_TOKEN cannot hold, so RELEASE.md
carries the maintainer-side check.

apps/docs/zh-CN/guide/getting-started.md

@@ -59,7 +59,7 @@ docker run -d --name SnapOtter -p 1349:1349 -v SnapOtter-data:/data ghcr.io/snap
 ```bash
 install -d -m 700 snapotter && cd snapotter
 curl --proto '=https' --tlsv1.2 -fsSLo docker-compose.yml \
-  https://raw.githubusercontent.com/snapotter-hq/SnapOtter/v2.1.0/docker/docker-compose.yml
+  https://raw.githubusercontent.com/snapotter-hq/SnapOtter/v2.2.0/docker/docker-compose.yml
 
 # Keep generated service credentials out of shell history and world-readable files.
 umask 077
@@ -72,7 +72,7 @@ docker compose -f docker-compose.yml pull
 docker compose -f docker-compose.yml up -d --no-build
 ```
 
-规范的 [`docker/docker-compose.yml`](https://github.com/snapotter-hq/SnapOtter/blob/v2.1.0/docker/docker-compose.yml) 包括所有四个运行时卷、运行状况检查、资源限制、持久 Redis 配置、固定数据库/缓存映像以及当前容器强化。首次登录后立即更改默认管理员密码。对于可重现的部署，请将 SnapOtter 应用程序映像固定到您验证的发布标签或摘要，而不是遵循 `latest`。
+规范的 [`docker/docker-compose.yml`](https://github.com/snapotter-hq/SnapOtter/blob/v2.2.0/docker/docker-compose.yml) 包括所有四个运行时卷、运行状况检查、资源限制、持久 Redis 配置、固定数据库/缓存映像以及当前容器强化。首次登录后立即更改默认管理员密码。对于可重现的部署，请将 SnapOtter 应用程序映像固定到您验证的发布标签或摘要，而不是遵循 `latest`。
 
 有关所有环境变量，请参阅[配置](/zh-CN/guide/configuration)；有关机密、网络策略和备份指南，请参阅[安全和强化](/zh-CN/guide/security)。