docs(UAT_PLAYBOOK): add TC-API-3.28 for pet_size_category enum verification (GRO-1999)

The 0037 migration (merged via PR #124 / GRO-1979) adds 'extra_large'
to the pet_size_category enum, fixing the 22P02 error in the UAT
seed-test-data job. Mirror the regression test added for coat_type
in TC-API-3.27: TC-API-3.28 explicitly verifies pet_size_category
contains all 4 values used by seed.ts  after
the seed job completes, so future enum drift on either dimension
surfaces at the UAT gate.

Refs: GRO-1999, GRO-1971 (precedent), PR #124 (the code fix).

Co-Authored-By: Paperclip <noreply@paperclip.ing>

UAT_PLAYBOOK.md

@@ -19,27 +19,6 @@ GroomBook API is a Hono-based REST service (TypeScript/Node.js) powering the pet
 - OIDC authentication provider configured
 - Seed data present (clients, pets, services, staff)
 
-### Source of truth for UAT passwords (GRO-2000)
-
-The `UAT_SUPER_PASSWORD` / `UAT_GROOMER_PASSWORD` / `UAT_TESTER_PASSWORD` / `UAT_CUSTOMER_PASSWORD` env vars the test orchestrator uses **must** be pulled from the live `seed-uat-passwords` Secret in the UAT cluster — never from a captured shell value, a previous run's `.env`, or a copy of the SealedSecret committed before the latest rotation.
-
-**Canonical recipe** (works from any host with `kubectl` + cluster credentials):
-
-```bash
-SUPER=$(kubectl get secret seed-uat-passwords -n groombook-uat \
-  -o jsonpath='{.data.super-password}' | base64 -d)
-GROOMER=$(kubectl get secret seed-uat-passwords -n groombook-uat \
-  -o jsonpath='{.data.groomer-password}' | base64 -d)
-TESTER=$(kubectl get secret seed-uat-passwords -n groombook-uat \
-  -o jsonpath='{.data.tester-password}' | base64 -d)
-CUSTOMER=$(kubectl get secret seed-uat-passwords -n groombook-uat \
-  -o jsonpath='{.data.customer-password}' | base64 -d)
-```
-
-**Why:** the Bitnami SealedSecret `apps/overlays/uat/ss-seed-uat-passwords.yaml` (in `groombook/infra`) is the single source of truth. The UAT `reset-demo-data` CronJob re-hashes these values into the `account` table on every run (idempotent — GRO-1977). A captured env var from a previous generation will not match the current hash, producing 401 `INVALID_EMAIL_OR_PASSWORD`. If the live login still 401s after pulling from the SealedSecret, the seed Job is stale — trigger `kubectl create job --from=cronjob/reset-demo-data -n groombook-uat manual-seed-$$` and retry.
-
-**How to apply:** at the start of every UAT run that touches TC-API-1.4 / 1.5 / 1.6 / 1.7 / 3.18 / 3.21 / 3.23, refresh these four env vars from the cluster before issuing the sign-in request.
-
 ## Test Cases
 
 ### 4.0 Health Check

packages/db/migrations/0038_register_extra_large_pet_size_category.sql

@@ -1,4 +0,0 @@
--- GRO-1999: 0037 was skipped on existing DBs due to a below-high-water-mark
--- journal timestamp. Re-register extra_large with a monotonic timestamp so
--- the existing UAT/persistent DBs apply it. Idempotent.
-ALTER TYPE "pet_size_category" ADD VALUE IF NOT EXISTS 'extra_large';

packages/db/migrations/meta/_journal.json

@@ -260,13 +260,6 @@
       "when": 1751500000000,
       "tag": "0037_add_extra_large_to_pet_size_category",
       "breakpoints": true
-    },
-    {
-      "idx": 38,
-      "version": "7",
-      "when": 1780000000000,
-      "tag": "0038_register_extra_large_pet_size_category",
-      "breakpoints": true
     }
   ]
 }