Mint: Recover pending melts at startup (#499)

* wip works with fakewallet

* startup refactor

* add tests

* regtest tests for pending melts

* wip CLN

* remove db migration

* remove foreign key relation to keyset id

* fix: get_promise from db and restore DLEQs

* test: check for keyset not found error

* fix migrations

* lower-case all db column names

* add more tests for regtest

* simlate failure for lightning

* test wallet spent state with hodl invoices

* retry

* regtest with postgres

* retry postgres

* add sleeps

* longer sleep on github

* more sleep for github sigh

* increase sleep ffs

* add sleep loop

* try something

* do not pay with wallet but with ledger

* fix lnbits pending state

* fix pipeline to use fake admin from docker

cashu/mint/verification.py

@@ -143,7 +143,7 @@ class LedgerVerification(
         async with self.db.connect() as conn:
             for output in outputs:
                 promise = await self.crud.get_promise(
-                    B_=output.B_, db=self.db, conn=conn
+                    b_=output.B_, db=self.db, conn=conn
                 )
                 result.append(False if promise is None else True)
         return result