refactor: track infra machine install status via a counter

With this change, we change the way we track whether Talos is installed on the disk or not in the bare-metal infra provider.

Previously, it worked like the following:
- Omni, when observing some specific type of events on SideroLink, set the `installed` flag on the dedicated `MachineState` resource to true.
- The provider, after wiping disks of a machine, set that flag to false.

This method went against the "single owner per resource" principle and was not leveraging COSI runtime and controller-based logic. Furthermore, it made the contract between Omni and the provider more complex since it was yet another resource.

Instead, now, we do the following:
- Every time we observe those specific types of events on SideroLink, we increment a counter field on the `infra.Machine` resource.
- When the provider wipes a machine, it persists this counter value at the time of wipe internally.
- To detect whether Talos is installed or not, the provider compares the internally stored counter value vs the value on the `infra.Machine`. It is "installed" only if the counter value on the `infra.Machine` is bigger than the internally stored one (it means we observed an installation after the last wipe).

Signed-off-by: Utku Ozdemir <[email protected]>

client/api/omni/specs/infra.proto

@@ -49,6 +49,15 @@ message InfraMachineSpec {
   string extra_kernel_args = 6;
   string requested_reboot_id = 7;
   bool cordoned = 8;
+
+  // InstallEventId is a counter, incremented each time Omni receives an event over SideroLink that indicates there is Talos installation on the disk.
+  //
+  // This value is then used by the infra provider to make the decision whether Talos is installed or not.
+  // It is able to track the installation state by:
+  // - Storing a copy of the value of this counter internally after wiping a machine.
+  // - Comparing the value of this counter with the stored value to determine if Talos is installed:
+  //   It is installed if the value of the counter is greater than the stored value.
+  uint64 install_event_id = 9;
 }
 
 message InfraMachineStateSpec {
@@ -68,6 +77,7 @@ message InfraMachineStatusSpec {
   bool ready_to_use = 2;
   string last_reboot_id = 3;
   google.protobuf.Timestamp last_reboot_timestamp = 4;
+  bool installed = 5;
 }
 
 message InfraProviderStatusSpec {

client/pkg/omni/resources/infra/infra.go

@@ -10,7 +10,6 @@ import "github.com/siderolabs/omni/client/pkg/omni/resources/registry"
 func init() {
 	registry.MustRegisterResource(MachineRequestType, &MachineRequest{})
 	registry.MustRegisterResource(MachineRequestStatusType, &MachineRequestStatus{})
-	registry.MustRegisterResource(InfraMachineStateType, &MachineState{})
 	registry.MustRegisterResource(InfraMachineType, &Machine{})
 	registry.MustRegisterResource(InfraMachineStatusType, &MachineStatus{})
 	registry.MustRegisterResource(InfraProviderStatusType, &ProviderStatus{})

client/pkg/omni/resources/infra/machine.go

@@ -77,6 +77,10 @@ func (MachineExtension) ResourceDefinition() meta.ResourceDefinitionSpec {
 				Name:     "Cordoned",
 				JSONPath: "{.cordoned}",
 			},
+			{
+				Name:     "Install Event ID",
+				JSONPath: "{.installeventid}",
+			},
 		},
 	}
 }