Add pubkey to the message structure

indexedDb/impl/dm/implementation.go

@@ -87,6 +87,7 @@ func buildMessage(messageID, parentID, text []byte, pubKey ed25519.PublicKey,
 		ConversationPubKey: pubKey,
 		ParentMessageID:    parentID,
 		Timestamp:          timestamp,
+		SenderPubKey:       pubKey[:],
 		Status:             uint8(status),
 		Text:               text,
 		Type:               uint16(mType),

indexedDb/impl/dm/model.go

@@ -45,6 +45,7 @@ type Message struct {
 	ConversationPubKey []byte    `json:"conversation_pub_key"` // Index
 	ParentMessageID    []byte    `json:"parent_message_id"`    // Index
 	Timestamp          time.Time `json:"timestamp"`            // Index
+	SenderPubKey       []byte    `json:"sender_pub_key"`
 	Status             uint8     `json:"status"`
 	Text               []byte    `json:"text"`
 	Type               uint16    `json:"type"`