Checklist to achieve experimental status

• add disk queue configuration to shipper configuration #119
• Add option to supply disk queue encryption key #120
• enrich diskqueue configuration with encryption_password when disk queue is encryption is enabled elastic-agent#1656
• Add disk queue options and operation to documentation #122
• The disk queue must assign an auto-incrementing ID to each element #27

Checklist to achieve beta status

• [Fleet] Add option to enable disk queue for elastic-agent-shipper kibana#141508
• Verify keystore is maintained during elastic-agent upgrades #123
• [Meta] Implement shipper performance testing #57
• Add disk queue metrics to shipper metrics #125
• Add explicit memory usage cap for the disk queue beats#30069
• Correctly handle enqueued events affected by agent policy changes #49

Checklist to achieve ga status

• [Fleet] Add feature so integrations can require elastic-agent-shipper disk queue kibana#141510
• [Fleet] Update agent dashboard visualization with elastic-agent-shipper queue metrics kibana#141512