backup: include cross-checker discovery entries in backup/restore

Extend Backup to carry the two new KV indexes introduced by the
discovery mechanism.

internal/api-admin/controller/backup_controller.go

@@ -160,6 +160,26 @@ func (bc *BackupController) DoBackup() (ret happydns.Backup) {
 		}
 	}
 
+	// Discovery entries.
+	if entryIter, err := bc.store.ListAllDiscoveryEntries(); err != nil {
+		ret.Errors = append(ret.Errors, fmt.Sprintf("unable to retrieve DiscoveryEntries: %s", err.Error()))
+	} else {
+		defer entryIter.Close()
+		for entryIter.Next() {
+			ret.DiscoveryEntries = append(ret.DiscoveryEntries, entryIter.Item())
+		}
+	}
+
+	// Discovery observation refs.
+	if refIter, err := bc.store.ListAllDiscoveryObservationRefs(); err != nil {
+		ret.Errors = append(ret.Errors, fmt.Sprintf("unable to retrieve DiscoveryObservationRefs: %s", err.Error()))
+	} else {
+		defer refIter.Close()
+		for refIter.Next() {
+			ret.DiscoveryObservationRefs = append(ret.DiscoveryObservationRefs, refIter.Item())
+		}
+	}
+
 	return
 }
 
@@ -238,6 +258,18 @@ func (bc *BackupController) DoRestore(backup *happydns.Backup) (errs error) {
 		errs = errors.Join(errs, bc.store.RestoreExecution(exec))
 	}
 
+	// Discovery entries. Restored after snapshots (referenced indirectly via
+	// target + producer, no FK), before observation refs which carry snapshot
+	// pointers that must resolve at lookup time.
+	for _, entry := range backup.DiscoveryEntries {
+		errs = errors.Join(errs, bc.store.RestoreDiscoveryEntry(entry))
+	}
+
+	// Discovery observation refs.
+	for _, ref := range backup.DiscoveryObservationRefs {
+		errs = errors.Join(errs, bc.store.RestoreDiscoveryObservationRef(ref))
+	}
+
 	return
 }
 

model/backup.go

@@ -22,17 +22,19 @@
 package happydns
 
 type Backup struct {
-	Version              int
-	Domains              []*Domain
-	DomainsLogs          map[string][]*DomainLog
-	Errors               []string
-	Providers            []*ProviderMessage
-	Sessions             []*Session
-	Users                []*User
-	UsersAuth            UserAuths
-	Zones                []*ZoneMessage
-	CheckerConfigurations []*CheckerOptionsPositional
-	CheckPlans            []*CheckPlan
-	CheckEvaluations      []*CheckEvaluation
-	Executions            []*Execution
+	Version                  int
+	Domains                  []*Domain
+	DomainsLogs              map[string][]*DomainLog
+	Errors                   []string
+	Providers                []*ProviderMessage
+	Sessions                 []*Session
+	Users                    []*User
+	UsersAuth                UserAuths
+	Zones                    []*ZoneMessage
+	CheckerConfigurations    []*CheckerOptionsPositional
+	CheckPlans               []*CheckPlan
+	CheckEvaluations         []*CheckEvaluation
+	Executions               []*Execution
+	DiscoveryEntries         []*StoredDiscoveryEntry
+	DiscoveryObservationRefs []*DiscoveryObservationRef
 }