Implement correct behaviour for handles

[clj]

Freeing handles should only be possible when all other "child" handles have been freed. This would mean tracking the relationship between handles, which isn't happening at the moment:

• https://learn.microsoft.com/en-us/sql/odbc/reference/syntax/sqlfreehandle-function?view=sql-server-ver16#freeing-an-environment-handle
• https://learn.microsoft.com/en-us/sql/odbc/reference/syntax/sqlfreehandle-function?view=sql-server-ver16#freeing-a-connection-handle
• https://learn.microsoft.com/en-us/sql/odbc/reference/syntax/sqlfreehandle-function?view=sql-server-ver16#freeing-a-statement-handle

This is more of a nice to have, since I doubt KiCad would be trying to release handles out of order