docs consolidation

docs/modules/attestor/architecture.md

@@ -28,7 +28,7 @@
 * **Rekor v2** — tile‑backed transparency log endpoint(s).
 * **MinIO (S3)** — optional archive store for DSSE envelopes & verification bundles.
 * **PostgreSQL** — local cache of `{uuid, index, proof, artifactSha256, bundleSha256}`; job state; audit.
-* **Redis** — dedupe/idempotency keys and short‑lived rate‑limit buckets.
+* **Valkey** — dedupe/idempotency keys and short‑lived rate‑limit buckets.
 * **Licensing Service (optional)** — “endorse” call for cross‑log publishing when customer opts‑in.
 
 Trust boundary: **Only the Signer** is allowed to call submission endpoints; enforced by **mTLS peer cert allowlist** + `aud=attestor` OpTok.
@@ -619,8 +619,8 @@ attestor:
     bucket: "stellaops"
     prefix: "attest/"
     objectLock: "governance"
-  redis:
-    url: "redis://redis:6379/2"
+  valkey:
+    url: "valkey://valkey:6379/2"
   quotas:
     perCaller:
       qps: 50