cloud-nuke

Features - Parallel scanning and nuking. Resource discovery and deletion now run concurrently, controlled by a new --parallelism flag (default 10). Regions and resource types are scanned under a single global concurrency cap, and regional resources are nuked concurrently while global resources (IAM, Route53, CloudFront) are deleted last. Within-region dependency order is preserved. (#1144, #1148) Fixes - Service-linked roles that delete quickly. When AWS purges the deletion-task record before the status poll (a NoSuchEntity response), the role is now verified via GetRole and treated as deleted instead of erroring. (#1147) Migration note - Library consumers: aws.NukeAllResources and gcp.NukeAllResources now take an additional parallelism int parameter. Full Changelog: v0.51.0...v0.52.0