Database connections not being closed when messages are sent

[nick-verida]

From @tahpot in Discord:

So... the code that sends the message creates a database instance to the remote database and then sends it, but doesn't close. It's not possible (at the moment anyway) to get that database connection and close it. So I'll need to do a protocol update to fix this

[tahpot]

Fix is in this PR: #355

[nick-verida]

Using the develop branch on 22-Nov-23, this doesn't seem to be fixed.

It does work correctly if I just open and close a context, but in this case it doesn't work:

this.veridaContext = await client.openContext("DID Message Sender", true) as Context;
const messaging = await this.veridaContext.getMessaging(); // works without this
await this.veridaContext.close();

[tahpot]

This should now be fixed with 69e3842

However, there remains an outstanding issue where a single database connection doesn't get closed when closing the context so applications may hang at the end.

This has been logged as a separate issue (#375) so this issue can be closed.