Use the DbTransaction type in the manager

The __conform__ can´t generate a tuple from the class, but it is still
worth to use the DB intermediate types for cleaner code. So add tuple()
method the the DBTransaction and use it when writing to the DB.

pfbudget/db/client.py

@@ -96,7 +96,7 @@ class DatabaseClient:
 
     def insert_transactions(self, transactions: Q.DbTransactions):
         logger.info(f"Adding {len(transactions)} into {self.db}")
-        self.__executemany(Q.ADD_TRANSACTION, transactions)
+        self.__executemany(Q.ADD_TRANSACTION, [t.tuple() for t in transactions])
 
     def update_category(self, transaction: Transaction):
         logger.info(f"Update {transaction} category")

pfbudget/db/schema.py

@@ -1,6 +1,5 @@
 from dataclasses import dataclass
 from decimal import Decimal
-import sqlite3
 
 CREATE_TRANSACTIONS_TABLE = """
 CREATE TABLE IF NOT EXISTS "transactions" (
@@ -25,8 +24,7 @@ class DbTransaction:
     original: str
     comments: str
 
-    def __conform__(self, protocol):
+    def tuple(self) -> tuple:
-        if protocol is sqlite3.PrepareProtocol:
         return (
             self.date,
             self.description,

pfbudget/utils/converters.py

@@ -13,7 +13,7 @@ def convert(t):
 
 @convert.register
 def _(t: Transaction) -> DbTransaction:
-    return (t.date, t.description, t.bank, t.value, t.category)
+    return DbTransaction(t.date, t.description, t.bank, t.value, t.category, t.original, t.additional_comment)
 
 
 @convert.register