container: hledger-flow: remove potential % interpretation (printf)

Removes potential interpretation of percent signs in various types of
descriptions/notes/labels (otherwise, import may break).

Resolves "fatal: not enough arguments to satisfy format string" under
certain conditions.

container/src/hledger-flow/accounts/discover/discover-shared.bash

@@ -2,7 +2,7 @@
 
 # docker-finance | modern accounting for the power-user
 #
-# Copyright (C) 2021-2024 Aaron Fiore (Founder, Evergreen Crypto LLC)
+# Copyright (C) 2021-2025 Aaron Fiore (Founder, Evergreen Crypto LLC)
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -47,6 +47,8 @@ function parse_credit()
 
          printf $1 OFS  # Trans. Date
          printf $2 OFS  # Post Date
+
+         sub(/%/, "%%", $3)
          printf $3 OFS  # Description
 
          # Flip the amount signs for proper liabilities accounting
@@ -74,7 +76,10 @@ function parse_bank()
          next
 
        printf $1 OFS  # Transaction Date
+
+       sub(/%/, "%%", $2)
        printf $2 OFS  # Transaction Description
+
        printf $3 OFS  # Transaction Type
 
        sub(/\$/,"",$4);