Mint: watchdog balance log and killswitch (#705)

* wip store balance

* store balances in watchdog worker

* move mint_auth_database setting

* auth db

* balances returned as Amount (instead of int)

* add test for balance change on invoice receive

* fix 1 test

* cancel tasks on shutdown

* watchdog can now abort

* remove wallet api server

* fix lndgrpc

* fix lnbits balance

* disable watchdog

* balance lnbits msat

* test db watcher with its own database connection

* init superclass only once

* wip: log balance in keysets table

* check max balance using new keyset balance

* fix test

* fix another test

* store fees in keysets

* format

* cleanup

* shorter

* add keyset migration to auth server

* fix fakewallet

* fix db tests

* fix postgres problems during migration 26 (mint)

* fix cln

* ledger

* working with pending

* super fast watchdog, errors

* test new pipeline

* delete walletapi

* delete unneeded files

* revert workflows

cashu/lightning/blink.py

@@ -90,7 +90,7 @@ class BlinkWallet(LightningBackend):
             logger.error(f"Blink API error: {exc}")
             return StatusResponse(
                 error_message=f"Failed to connect to {self.endpoint} due to: {exc}",
-                balance=0,
+                balance=Amount(self.unit, 0),
             )
 
         try:
@@ -100,7 +100,7 @@ class BlinkWallet(LightningBackend):
                 error_message=(
                     f"Received invalid response from {self.endpoint}: {r.text}"
                 ),
-                balance=0,
+                balance=Amount(self.unit, 0),
             )
 
         balance = 0
@@ -113,7 +113,7 @@ class BlinkWallet(LightningBackend):
                 self.wallet_ids[Unit.sat] = wallet_dict["id"]  # type: ignore
                 balance = wallet_dict["balance"]  # type: ignore
 
-        return StatusResponse(error_message=None, balance=balance)
+        return StatusResponse(error_message=None, balance=Amount(self.unit, balance))
 
     async def create_invoice(
         self,