refactor: fix duplicate keychecker (#2339)

* refactor: fix duplicate keychecker

- refactor KeyChecker to be more approachable
- only 1 sql query needed even if you use `get_key_type`
- rename `WalletType` to `KeyType` wallet type was misleading

fix test

sorting

* fixup!

* revert 404

lnbits/core/crud.py

@@ -8,7 +8,6 @@ import shortuuid
 from passlib.context import CryptContext
 
 from lnbits.core.db import db
-from lnbits.core.models import WalletType
 from lnbits.db import DB_TYPE, SQLITE, Connection, Database, Filters, Page
 from lnbits.extension_manager import InstallableExtension
 from lnbits.settings import (
@@ -628,7 +627,6 @@ async def get_wallets(user_id: str, conn: Optional[Connection] = None) -> List[W
 
 async def get_wallet_for_key(
     key: str,
-    key_type: WalletType = WalletType.invoice,
     conn: Optional[Connection] = None,
 ) -> Optional[Wallet]:
     row = await (conn or db).fetchone(
@@ -643,9 +641,6 @@ async def get_wallet_for_key(
     if not row:
         return None
 
-    if key_type == WalletType.admin and row["adminkey"] != key:
-        return None
-
     return Wallet(**row)