fix(db): remove duplicate petSizeCategoryEnum/coatTypeEnum declarations (GRO-1522)

The schema file had two sets of these enum declarations with different values.
The first (stale) set broke all tests importing @groombook/db via the vitest alias,
causing CI to fail and blocking the docker build job.

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

packages/db/src/schema.ts

@@ -48,22 +48,6 @@ export const clientStatusEnum = pgEnum("client_status", [
   "disabled",
 ]);
 
-export const petSizeCategoryEnum = pgEnum("pet_size_category", [
-  "small",
-  "medium",
-  "large",
-  "xlarge",
-]);
-
-export const coatTypeEnum = pgEnum("coat_type", [
-  "smooth",
-  "double",
-  "wire",
-  "curly",
-  "long",
-  "hairless",
-]);
-
 // ─── Better-Auth Tables ──────────────────────────────────────────────────────
 
 export const user = pgTable("user", {