I wouldn't add it directly to the garden.
I'm all for the complex mineral salts from seaweed/diluted seawater,
but plain old sodium chloride is nasty stuff, even diluted.
My old fermenting brine goes on the compost- the salt's bound to be a bit rough on the microbes there,
but they cope and any salt is diluted to basically nothing.
The lactobacillus may survive in the
compost, I don't know.