fix: remove duplicate bufferRules table and duplicate properties blocking Docker build

CI Run 942 Docker build fails on TS2451 (duplicate bufferRules at lines
190 & 653 of schema.ts), TS1117 (duplicate defaultBufferMinutes in
services table, duplicate coatType/petSizeCategory in factories.ts),
and TS2322 (null vs number for defaultBufferMinutes in factories.ts).

Keep the newer, more complete bufferRules declaration (with comments and
index) and the .notNull().default(0) variant of defaultBufferMinutes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/db/src/factories.ts

@@ -105,8 +105,6 @@ export function buildPet(overrides: Partial<PetRow> & { clientId: string }): Pet
     photoKey: null,
     photoUploadedAt: null,
     image: null,
-    coatType: null,
-    petSizeCategory: null,
     createdAt: new Date("2025-01-01T00:00:00Z"),
     updatedAt: new Date("2025-01-01T00:00:00Z"),
   };
@@ -121,7 +119,7 @@ export function buildService(overrides: Partial<ServiceRow> = {}): ServiceRow {
     description: "A grooming service",
     basePriceCents: 6500,
     durationMinutes: 60,
-    defaultBufferMinutes: null,
+    defaultBufferMinutes: 0,
     active: true,
     createdAt: new Date("2025-01-01T00:00:00Z"),
     updatedAt: new Date("2025-01-01T00:00:00Z"),

packages/db/src/schema.ts

@@ -180,35 +180,12 @@ export const services = pgTable("services", {
   description: text("description"),
   basePriceCents: integer("base_price_cents").notNull(),
   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(),
 });
 
-export const bufferRules = pgTable(
-  "buffer_rules",
-  {
-    id: uuid("id").primaryKey().defaultRandom(),
-    serviceId: uuid("service_id")
-      .notNull()
-      .references(() => services.id, { onDelete: "cascade" }),
-    sizeCategory: petSizeCategoryEnum("size_category"),
-    coatType: coatTypeEnum("coat_type"),
-    bufferMinutes: integer("buffer_minutes").notNull(),
-    createdAt: timestamp("created_at").notNull().defaultNow(),
-    updatedAt: timestamp("updated_at").notNull().defaultNow(),
-  },
-  (t) => [
-    unique("uq_buffer_rules_service_size_coat").on(
-      t.serviceId,
-      t.sizeCategory,
-      t.coatType
-    ),
-  ]
-);
-
 export const staff = pgTable("staff", {
   id: uuid("id").primaryKey().defaultRandom(),
   name: text("name").notNull(),