feat: remove groups

[jajeffries]

This pull request introduces support for handling group removal events in the MQTT fleet connection and messaging system. It refactors how topic actions (subscribe, publish, unsubscribe) are passed around, and adds logic to properly unsubscribe from topics and clean up associated policies when a group is removed.

Key changes include:

Support for Group Removal and Policy Cleanup:

• Added a new handler handleAgentGroupRemoval in Messaging to process group removal events. This handler unsubscribes from the relevant MQTT topic and removes or updates policies that are no longer associated with any group or dataset.
• Added support for the GroupRemovedRPCFunc message type in the dispatcher, invoking the new handler when such a message is received.

Refactoring of Topic Actions:

• Introduced a new TopicActions struct to encapsulate subscribe, publish, and unsubscribe functions, simplifying how these actions are passed between components. [1] [2]
• Updated the MQTT connection logic to use the new TopicActions struct, including adding an unsubscribeFromTopic method to handle topic unsubscriptions. [1] [2]

Message Payload Changes:

• Removed the unused ChannelID field from the GroupRemovedRPCPayload struct, streamlining the payload for group removal events.

Dependency Update:

• Added a missing import for the backend package in from_rpc.go to support backend-specific operations in policy cleanup.

[github-actions]

Go test coverage

STATUS	ELAPSED	PACKAGE	COVER	PASS	FAIL	SKIP
🟢 PASS	0.01s	github.com/netboxlabs/orb-agent/agent	0.0%	0	0	0
🟢 PASS	0.01s	github.com/netboxlabs/orb-agent/agent/backend	0.0%	0	0	0
🟢 PASS	4.03s	github.com/netboxlabs/orb-agent/agent/backend/devicediscovery	79.4%	2	0	0
🟢 PASS	0.00s	github.com/netboxlabs/orb-agent/agent/backend/mocks	0.0%	0	0	0
🟢 PASS	4.03s	github.com/netboxlabs/orb-agent/agent/backend/networkdiscovery	80.6%	2	0	0
🟢 PASS	4.03s	github.com/netboxlabs/orb-agent/agent/backend/opentelemetryinfinity	74.1%	2	0	0
🟢 PASS	4.03s	github.com/netboxlabs/orb-agent/agent/backend/pktvisor	71.7%	2	0	0
🟢 PASS	4.03s	github.com/netboxlabs/orb-agent/agent/backend/snmpdiscovery	80.2%	2	0	0
🟢 PASS	5.04s	github.com/netboxlabs/orb-agent/agent/backend/worker	80.6%	3	0	0
🟢 PASS	1.01s	github.com/netboxlabs/orb-agent/agent/config	100.0%	6	0	0
🟢 PASS	31.15s	github.com/netboxlabs/orb-agent/agent/configmgr	51.5%	13	0	0
🟢 PASS	4.42s	github.com/netboxlabs/orb-agent/agent/configmgr/fleet	66.0%	69	0	0
🟢 PASS	1.01s	github.com/netboxlabs/orb-agent/agent/policies	100.0%	15	0	0
🟢 PASS	1.03s	github.com/netboxlabs/orb-agent/agent/policymgr	70.3%	10	0	0
🟢 PASS	31.60s	github.com/netboxlabs/orb-agent/agent/secretsmgr	48.9%	54	0	0
🟢 PASS	1.01s	github.com/netboxlabs/orb-agent/agent/version	100.0%	1	0	0

Total coverage: 62.1%

[github-actions]

🎉 This PR is included in version 2.5.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[github-actions]

🎉 This PR is included in version 2.5.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀