wrap errors in database hooks

Signed-off-by: Kristoffer Dalby <[email protected]>

hscontrol/types/node.go

@@ -276,7 +276,7 @@ func (n *Node) BeforeSave(tx *gorm.DB) (err error) {
 
  hi, err := json.Marshal(n.Hostinfo)
  if err != nil {
- return err
+ return fmt.Errorf("failed to marshal Hostinfo to store in db: %w", err)
  }
  n.HostinfoDatabaseField = string(hi)
 
@@ -291,27 +291,27 @@ func (n *Node) BeforeSave(tx *gorm.DB) (err error) {
 func (n *Node) AfterFind(tx *gorm.DB) (err error) {
  var machineKey key.MachinePublic
  if err := machineKey.UnmarshalText([]byte(n.MachineKeyDatabaseField)); err != nil {
- return err
+ return fmt.Errorf("failed to unmarshal machine key from db: %w", err)
  }
  n.MachineKey = machineKey
 
  var nodeKey key.NodePublic
  if err := nodeKey.UnmarshalText([]byte(n.NodeKeyDatabaseField)); err != nil {
- return err
+ return fmt.Errorf("failed to unmarshal node key from db: %w", err)
  }
  n.NodeKey = nodeKey
 
  var discoKey key.DiscoPublic
  if err := discoKey.UnmarshalText([]byte(n.DiscoKeyDatabaseField)); err != nil {
- return err
+ return fmt.Errorf("failed to unmarshal disco key from db: %w", err)
  }
  n.DiscoKey = discoKey
 
  var endpoints []netip.AddrPort
  for _, ep := range n.EndpointsDatabaseField {
  addrPort, err := netip.ParseAddrPort(ep)
  if err != nil {
- return err
+ return fmt.Errorf("failed to parse endpoint from db: %w", err)
  }
 
  endpoints = append(endpoints, addrPort)
@@ -320,7 +320,7 @@ func (n *Node) AfterFind(tx *gorm.DB) (err error) {
 
  var hi tailcfg.Hostinfo
  if err := json.Unmarshal([]byte(n.HostinfoDatabaseField), &hi); err != nil {
- return err
+ return fmt.Errorf("failed to unmarshal Hostinfo from db: %w", err)
  }
  n.Hostinfo = &hi