feat(api-sync): implement sync pull endpoint with cursor

apps/api/src/sync/dto/sync-pull.dto.ts

@@ -0,0 +1,16 @@
+import { Type } from "class-transformer";
+import { IsInt, IsOptional, IsString, Max, MaxLength, Min } from "class-validator";
+
+export class SyncPullQueryDto {
+  @IsOptional()
+  @IsString()
+  @MaxLength(512)
+  cursor?: string;
+
+  @Type(() => Number)
+  @IsOptional()
+  @IsInt()
+  @Min(1)
+  @Max(200)
+  limit?: number;
+}