Note latest.md report mirror in ADR-012

Final-review minor: the /capacity-review skill overwrites a latest.md
pointer alongside the dated report; record that in the ADR.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/decisions/012-hardware-capacity.md

@@ -18,7 +18,8 @@ workload that should move, or a node due an upgrade.
   cross-checks workload hostnames against `terraform output -json` /
   `ansible-inventory --list` to surface drift.
 - `/capacity-review` reads the scan + intent columns and writes a dated report to
-  `docs/hardware/reviews/`, mirroring `/review-repo` → `docs/reviews/`.
+  `docs/hardware/reviews/YYYY-MM-DD-capacity.md`, also overwriting
+  `docs/hardware/reviews/latest.md`, mirroring `/review-repo` → `docs/reviews/`.
 - Numeric allocations live in `reference.md`, not Terraform: the current
   `terraform output` exposes only `{ip, group}`. Terraform/inventory are used
   only for hostname-drift cross-checks.