bug: Node setup complete even --store-message-db-url is wrong

[AlbertoSoutullo]

Problem

nWaku completes the setup even flag --store-message-db-url is set up wrong.

To reproduce

Assuming a correct node setup, change the --store-message-db-url from a correct one like
"postgres://postgres:wakupassword@127.0.0.1:5432/postgres"
to
"postgresql://postgres:wakupassword@127.0.0.1:5432/postgres"

Expected behavior

The node should fail the setup, as the url is not existent.

nwaku version/commit hash

v0.32.0-rc.2

Additional context

Maybe is something related to how you handle the URL in the parsing of the flags, this should be easy to check.
What worries me a little bit more is even at startup if the flag value is not checked correctly, how nWaku is not crashing or logging errors afterwards, when it is supposed to have --store=true and should be archiving messages. Because in my case, the node was working correctly, but it was not saving messages in the DB.

CC: thx to @Ivansete-status for the help