Be more clever when triggering diff calculations. If a diff calc is started bring it to its end. Before starting look if it is done and in db notice it as ready. When a calculation is on its way add to list of waiting calls to avoid starting a calculation again. Only do two diff calcs at a time.

# documentation
**/README*
**/docs
**/*.md

# backend binary
cmd/gemma/gemma

# Dependency directories
.buildbase
**/node_modules

# local dotenv environment variables file
client/.env.local

# Tags tables
**/TAGS