feat: enqueue pricing refresh jobs

docs/API.md

@@ -64,6 +64,7 @@ POST   /api/v1/admin/inventory/:id/list
 POST   /api/v1/admin/inventory/:id/archive
 POST   /api/v1/admin/inventory/:id/relist
 POST   /api/v1/admin/inventory/:id/pricing/refresh
+GET    /api/v1/admin/jobs/:id
 
 GET    /api/v1/admin/listings
 GET    /api/v1/admin/listings/:id
@@ -123,6 +124,11 @@ records an audit event. Pricing observations remain private; public listing
 detail exposes only the latest calculated or manually overridden market value,
 condition label, and public image URLs.
 
+Pricing refresh returns `202 Accepted` with a durable job identifier and
+`PENDING` status. Poll the job endpoint for `PROCESSING`, `COMPLETED`, or
+`FAILED`; job status reads are seller-scoped and expose only safe status/error
+metadata.
+
 ## Provider matching
 
 The API must expose Product-level operations for: