feat(schema): declare a host hardware capability, hardware.gpu: intel-quicksync

A ServiceDefinition could not say it needs the host's Intel QuickSync render
device. The schema is `additionalProperties: false`, so there was no authorable
form for it at all, and `apps/` is generated — a hand-edit would be reverted by
the next render.

Adds optional top-level `hardware`, with one optional member `gpu`, an enum
whose only current value is `intel-quicksync` (schema 1.7.0 -> 1.8.0).

The enum is the point. The SD declares WHAT CLASS of device it needs; the
hostPath, the mount and the GID live only in catalog/render.py. Migrating to
the Intel GPU device plugin (`gpu.intel.com/i915` resource requests, no
hostPath) is then a renderer change with zero catalog edits. Letting an SD name
`/dev/dri` directly would look simpler and make that migration a catalog-wide
edit, so both the schema description and the renderer contract say so
explicitly.

When `hardware.gpu == intel-quicksync`, r_deployment emits, on the app
container / pod spec only:

  - a hostPath volume `dri` -> /dev/dri, type DirectoryOrCreate;
  - a read-write volumeMount of it at /dev/dri (VA-API opens the render node
    read-write, so deliberately not readOnly);
  - INTEL_RENDER_GID MERGED into podSecurityContext.supplementalGroups, never
    clobbering what the SD already declares.

`DirectoryOrCreate` is load-bearing. A node that comes back without the render
device (rebuild, BIOS change, driver regression, hardware swap) must degrade
the workload to software transcoding, not fail the mount: apps-wave-0 is
`wait: true` and apps-wave-1 dependsOn it, so a failed hostPath mount stalls
the whole app tier for a feature that is not load-bearing. /dev is tmpfs, so
the empty directory the kubelet creates leaves nothing durable behind. Its cost
— a missing device is silent, and no metric exists to alert on — is recorded in
the contract rather than papered over with an alert that could not fire.

Deliberately NOT emitted: no `privileged: true` (Kyverno restrict-host-
namespaces is Enforce and it is not needed), no nodeSelector (placement is a
separate concern with its own justification), no resource requests (there is no
app-container resource render path).

INTEL_RENDER_GID = 992 is a single named constant carrying its provenance:
measured on all three prod nodes on 2026-09-30, and a *systemd dynamic*
allocation rather than a static GID, so a node rebuild can move it.

No catalog entry uses the field. Re-rendering `--all catalog -o apps` is a zero
diff, which is the proof the change is inert until opted into.

Three self-test cases in the existing check(...) style: the positive, the
negative (an SD without `hardware` gains no volume, no mount, no
securityContext — mirroring the podSecurityContext negative) and the merge case
([44] + 992 -> [44, 992], fsGroup preserved). Note that NO gate stage runs
`render.py --selftest`; they were run by hand and the gap is recorded in the
handoff.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>

schemas/README.md

@@ -15,7 +15,7 @@ docs/13 exactly. Do not diverge from it here — escalate spec problems, don't f
 | `servicedefinition.schema.json` | Formal JSON Schema (draft 2020-12) for a ServiceDefinition. Enforces enums, required fields, patterns, and cross-field invariants. |
 | `renderer-contract.md` | Authoritative field → rendered-resource mapping, with requirement IDs. The contract other workstreams consume. |
 
-**Schema version:** 1.0.0 (in the schema `description`). Treat any change as an interface change:
+**Schema version:** 1.8.0 (in the schema `description`, which carries the full per-version changelog — this line had said `1.0.0` since 1.1.0 and is now synced). Treat any change as an interface change:
 propose on the task board, update dependent renderers/tests in the same change, never silently break a
 consumer (coordination-protocol §2).
 
@@ -35,6 +35,9 @@ consumer (coordination-protocol §2).
 - `ingressRoutes[].host` must match `<label>.home.keithjackson.dev`.
 - `storage[].class ∈ {longhorn, bulk}`; `exposure ∈ {internal, public}`; `egress ∈ {internet, vpn}`;
   `auth.mode ∈ {oidc, forward-auth, native, none}`.
+- `hardware.gpu ∈ {intel-quicksync}` — a host **capability class**, never a device path. The enum
+  is the contract: the mechanism that satisfies it lives only in `catalog/render.py` (see
+  `renderer-contract.md` §`hardware`).
 - `additionalProperties: false` everywhere — unknown keys are rejected (catches typos in review/CI).
 
 ## Validate examples against the schema — L1, no cluster (R-TEST-02)