* notifications: periodic notifications
* agent: allow repeat token registrations, delete old tokens from notification server (e.g., when database is moved to another device)
* decrypt token verification code in the agent
* check token status, send TCRN on registration if it was enabled
* fix http2/apns response handling for error responses (also, APNS seems not to send content-length header?)
* agent schema/methods/types/store methods for notifications tokens
* register notification token on the server
* agent commands for notification tokens
* refactor initial servers from AgentConfig
* agent store functions for notification tokens
* server STM store methods for tokens
* fix protocol client for ntfs (use generic handshake), minimal server and agent tests
* server command to verify ntf token
* process ntf server commands
* when subscription is re-created and it was ENDed, resubscribe to SMP
* SMPClientAgent draft
* SMPClientAgent: remove double tracking of subscriptions
* subscriber frame
* PING error now throws error to restart SMPClient for more reliable re-connection (#342)
* increase TCP timeout to 5 sec
* add pragmas and vacuum db (#343)
* vacuum in each connection to enable auto-vacuum (#344)
* update protocol, token verification
* refactor SMPClient to ProtocoClient, to use with notification server protocol
* notification server client, managing notification clients in the agent
* stub for push payload
Co-authored-by: JRoberts <8711996+jr-simplex@users.noreply.github.com>
