Improvements

Rook v1.19.6 is a patch release limited in scope and focusing on feature additions and bug fixes to the Ceph operator.

• helm: Update prometheus rules from upstream ceph/ceph; add cluster label to all scraped metrics (#17544, @jhoblitt)
• osd: Honor per-device deviceClass in raw-mode prepare and reconcile (#17407, @arttor)
• mgr: Retry self-signed cert creation on wrapped context deadline errors (#17472, @texasich)
• mon: Check node existence on every health check iteration (#17484, @taraasrita10)
• core: Add default ResourceRequirements for cmd-reporter (#17464, @jhoblitt)
• osd: Detect encryption label from dmcrypt path (#17453, @sp98)
• exporter: Set correct DNSPolicy for rook-ceph-exporter (#17451, @rohan47)
• doc: Add CSI operator resource cleanup steps to teardown guide (#17286, @lumir-sliva)
• build: Bump golang.org/x/net to fix govulncheck ci failure (#17504, @OdedViner)
• build: Bump github.com/moby/spdystream from 0.5.0 to 0.5.1 (#17364, @dependabot[bot])
• ci: bump golang.org/x/net to v0.55.0 to fix GO-2026-5026 (#17582, @OdedViner)
• ci: bump and/or pin github action versions (#17577, @jhoblitt)