Fix zero UUID and storage metrics issues\n\n- Add ID generation in signAndCreateCommand to prevent zero UUIDs\n- Fix storage metrics metadata field (remove pq.Array)\n- Add IdempotencyKey field to AgentCommand model\n\nThese issues were causing duplicate key violations and storage page errors.

aggregator-server/internal/api/handlers/subsystems.go

@@ -32,6 +32,19 @@ func NewSubsystemHandler(sq *queries.SubsystemQueries, cq *queries.CommandQuerie
 
 // signAndCreateCommand signs a command if signing service is enabled, then stores it in the database
 func (h *SubsystemHandler) signAndCreateCommand(cmd *models.AgentCommand) error {
+	// Generate ID if not set (prevents zero UUID issues)
+	if cmd.ID == uuid.Nil {
+		cmd.ID = uuid.New()
+	}
+
+	// Set timestamps if not set
+	if cmd.CreatedAt.IsZero() {
+		cmd.CreatedAt = time.Now()
+	}
+	if cmd.UpdatedAt.IsZero() {
+		cmd.UpdatedAt = time.Now()
+	}
+
 	// Sign the command before storing
 	if h.signingService != nil && h.signingService.IsEnabled() {
 		signature, err := h.signingService.SignCommand(cmd)

aggregator-server/internal/database/queries/storage_metrics.go

@@ -34,7 +34,7 @@ func (q *StorageMetricsQueries) InsertStorageMetric(ctx context.Context, metric
 		metric.ID, metric.AgentID, metric.Mountpoint, metric.Device,
 		metric.DiskType, metric.Filesystem, metric.TotalBytes,
 		metric.UsedBytes, metric.AvailableBytes, metric.UsedPercent,
-		metric.Severity, pq.Array(metric.Metadata), metric.CreatedAt,
+		metric.Severity, metric.Metadata, metric.CreatedAt,
 	)
 
 	if err != nil {

aggregator-server/internal/models/command.go

@@ -16,6 +16,7 @@ type AgentCommand struct {
 	Status         string     `json:"status" db:"status"`
 	Source         string     `json:"source" db:"source"`
 	Signature      string     `json:"signature,omitempty" db:"signature"`
+	IdempotencyKey *string    `json:"idempotency_key,omitempty" db:"idempotency_key"`
 	CreatedAt      time.Time  `json:"created_at" db:"created_at"`
 	UpdatedAt      time.Time  `json:"updated_at" db:"updated_at"`
 	SentAt         *time.Time `json:"sent_at,omitempty" db:"sent_at"`