v1.7.1: e2e tests and new websocket/queue logic

This release completely rebuilds the websocket and API request queue logic and includes bug, performance, and UX fixes.

- new method for mempool.space websocket subscription management
  - now managed per address to prevent hundreds of websocket subscriptions
  - improved websocket logic for adding/editing/deleting addresses
  - showing websocket subscription status in address row
- clearer UI for zero balances (opacity reduction)
- tighter UI (reduced margin/padding)
- fix auto-acceptance bug (failing to alert telegram when alert is set in some cases)
- descriptor and extended key rows now show balance summary of address lists
- more robust e2e tests