Replace OpenDNSSEC with NLnet Labs Cascade when released (by June)

[getpinga]

When NLnet Labs releases Cascade (expected by June), update the registry to replace OpenDNSSEC with Cascade for DNSSEC signing.

Acceptance Criteria

• Monitor the release of NLnet Labs Cascade (track upstream).
• Evaluate and plan migration steps from OpenDNSSEC to Cascade.
• Replace OpenDNSSEC dependencies/configurations with Cascade.
• Update documentation and deployment scripts.
• Test successful operation and signing with Cascade.
• Complete the migration before the end of June.

References

• NLnet Labs Cascade project
• OpenDNSSEC project

If the NLnet Labs Cascade release timeline slips, adjust the schedule accordingly but keep this issue updated.