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/guide/docker-tags.md

@@ -137,8 +137,8 @@ For NVIDIA CUDA acceleration via Docker Compose, add the deploy section to the S
 | Tag | Description |
 |-----|------------|
 | `latest` | Latest release |
-| `2.1.0` | Exact version |
-| `2.1` | Latest patch in 2.1.x |
+| `2.2.0` | Exact version |
+| `2.2` | Latest patch in 2.2.x |
 | `2` | Latest minor in 2.x |
 
 ## Platforms {#platforms}

apps/docs/guide/getting-started.md

@@ -55,7 +55,7 @@ Use the production file maintained and tested with each release instead of copyi
 ```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
@@ -68,7 +68,7 @@ docker compose -f docker-compose.yml pull
 docker compose -f docker-compose.yml up -d --no-build
 ```
 
-The canonical [`docker/docker-compose.yml`](https://github.com/snapotter-hq/SnapOtter/blob/v2.1.0/docker/docker-compose.yml) includes all four runtime volumes, health checks, resource limits, durable Redis configuration, pinned database/cache images, and the current container hardening. Change the default admin password immediately after first login. For a reproducible deployment, pin the SnapOtter application image to the release tag or digest you verified instead of following `latest`.
+The canonical [`docker/docker-compose.yml`](https://github.com/snapotter-hq/SnapOtter/blob/v2.2.0/docker/docker-compose.yml) includes all four runtime volumes, health checks, resource limits, durable Redis configuration, pinned database/cache images, and the current container hardening. Change the default admin password immediately after first login. For a reproducible deployment, pin the SnapOtter application image to the release tag or digest you verified instead of following `latest`.
 
 See [Configuration](/guide/configuration) for all environment variables and [Security & Hardening](/guide/security) for secrets, network policy, and backup guidance.
 

apps/docs/guide/security.md

@@ -238,7 +238,7 @@ Each SnapOtter release includes the following security artifacts:
 Download the release-subject manifest and verify that it was attested by the release workflow:
 
 ```bash
-gh attestation verify snapotter-v2.1.0-release-subjects.json \
+gh attestation verify snapotter-v2.2.0-release-subjects.json \
   --repo snapotter-hq/SnapOtter \
   --signer-workflow snapotter-hq/SnapOtter/.github/workflows/release.yml
 ```
@@ -249,13 +249,13 @@ You can also scan a downloaded SBOM or the image directly:
 
 ```bash
 # Scan with Grype using the CycloneDX SBOM
-grype sbom:snapotter-v2.1.0-image-linux-amd64-sbom.cdx.json
+grype sbom:snapotter-v2.2.0-image-linux-amd64-sbom.cdx.json
 
 # Scan with Trivy using the SPDX SBOM
-trivy sbom snapotter-v2.1.0-image-linux-amd64-sbom.spdx.json
+trivy sbom snapotter-v2.2.0-image-linux-amd64-sbom.spdx.json
 
 # Scan the Docker image directly
-trivy image snapotter/snapotter:2.1.0
+trivy image snapotter/snapotter:2.2.0
 ```
 
 ::: info