feat(GRO-1171): add Admin API — Buffer Rules CRUD + service/pet updates

- Add buffer_rules table with serviceId/sizeCategory/coatType/bufferMinutes
- Add petSizeCategoryEnum (small/medium/large/extra_large) and coatTypeEnum
  to schema; update pets table columns to use the typed enums
- Add defaultBufferMinutes to services table
- Add apps/api/src/routes/buffer-rules.ts with GET/POST/PATCH/DELETE,
  all manager-only via requireRole("manager")
- Register /api/buffer-rules router in index.ts
- PATCH /api/services/:id accepts optional defaultBufferMinutes
- POST/PATCH /api/pets accepts optional sizeCategory and coatType

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

packages/db/src/schema.ts

@@ -116,6 +116,26 @@ export const verification = pgTable("verification", {
   updatedAt: timestamp("updated_at").notNull().defaultNow(),
 });
 
+// ─── Pet enums ─────────────────────────────────────────────────────────────────
+
+export const petSizeCategoryEnum = pgEnum("pet_size_category", [
+  "small",
+  "medium",
+  "large",
+  "extra_large",
+]);
+
+export const coatTypeEnum = pgEnum("coat_type", [
+  "short",
+  "medium",
+  "long",
+  "double",
+  "wire",
+  "silky",
+  "curly",
+  "hairless",
+]);
+
 // ─── Tables ───────────────────────────────────────────────────────────────────
 
 export const clients = pgTable(
@@ -178,6 +198,7 @@ export const services = pgTable("services", {
   durationMinutes: integer("duration_minutes").notNull(),
   defaultBufferMinutes: integer("default_buffer_minutes"),
   active: boolean("active").notNull().default(true),
+  defaultBufferMinutes: integer("default_buffer_minutes").notNull().default(0),
   createdAt: timestamp("created_at").notNull().defaultNow(),
   updatedAt: timestamp("updated_at").notNull().defaultNow(),
 });
@@ -640,3 +661,34 @@ export const authProviderConfig = pgTable("auth_provider_config", {
   createdAt: timestamp("created_at").notNull().defaultNow(),
   updatedAt: timestamp("updated_at").notNull().defaultNow(),
 });
+
+// ─── Buffer Rules ─────────────────────────────────────────────────────────────
+
+// Buffer time rules per service + pet size/coat combination.
+// Covers service-level defaults and pet-specific overrides.
+export const bufferRules = pgTable(
+  "buffer_rules",
+  {
+    id: uuid("id").primaryKey().defaultRandom(),
+    serviceId: uuid("service_id")
+      .notNull()
+      .references(() => services.id, { onDelete: "cascade" }),
+    // null sizeCategory means "any size" (wildcard)
+    sizeCategory: petSizeCategoryEnum("size_category"),
+    // null coatType means "any coat type" (wildcard)
+    coatType: coatTypeEnum("coat_type"),
+    // minutes to add to the service duration for this size/coat combo
+    bufferMinutes: integer("buffer_minutes").notNull(),
+    createdAt: timestamp("created_at").notNull().defaultNow(),
+    updatedAt: timestamp("updated_at").notNull().defaultNow(),
+  },
+  (t) => [
+    // One rule per unique (service, size, coat) combination
+    unique("uq_buffer_rules_service_size_coat").on(
+      t.serviceId,
+      t.sizeCategory,
+      t.coatType
+    ),
+    index("idx_buffer_rules_service_id").on(t.serviceId),
+  ]
+);