prevent pay_invoice from locking sqlite for the entire app.

lnbits/core/services.py

@@ -85,7 +85,6 @@ async def pay_invoice(
     description: str = "",
     conn: Optional[Connection] = None,
 ) -> str:
-    async with (db.reuse_conn(conn) if conn else db.connect()) as conn:
     temp_id = f"temp_{urlsafe_short_hash()}"
     internal_id = f"internal_{urlsafe_short_hash()}"
 
@@ -160,6 +159,7 @@ async def pay_invoice(
         # actually pay the external invoice
         payment: PaymentResponse = await WALLET.pay_invoice(payment_request)
         if payment.checking_id:
+            async with (db.reuse_conn(conn) if conn else db.connect()) as conn:
                 await create_payment(
                     checking_id=payment.checking_id,
                     fee=payment.fee_msat,