Returns a CSV export of the compensation benchmark detail view for a single job, optionally scoped to a specific location. Rows include employee-level data (name, location, annualized pay, compa-ratio, range penetration, years of experience) alongside the company's internal pay band for the job. Use GET /api/v1/compensation/benchmarks to find valid jobId and locationId values. When locationId is omitted, the export aggregates across all locations for the job.