After a few months, the nitrogen will have been consumed and integrated into the compost by the microbes. With the compost spread around, heat should not be an issue. Those worms will make good use of the compost you have added, turning it into rich castings which will surely give your garden a fine
boost.
I would suggest covering the soil with a layer of mulch when your seedlings are a few inches high. After putting all that work into the compost and soil, the mulch will help to protect the soil from compaction, keep the tilth light so weeds will pull out easily, suppress weed growth, maintain moisture and block sunlight which the worms will appreciate.