dsh-cache-hit-precision: Display DSH status bar cache hit rate with two decimal places.

# Introduction Under the status bar in dsh web, there is a line of statistics, and the cache hit rate is one of them. By default, this value is not displayed with two decimal places, which makes it difficult to observe subtle changes between consecutive rounds. To modify such displays, directly editing the code in the dsh installation directory is one approach, but it mixes your changes with the upstream environment, making maintenance difficult. The philosophy of DSH is "everything is a plugin," and these kinds of minor interface changes are perfect candidates for a plugin solution. The following introduces just such a small plugin: dsh-cache-hit-precision, created by luern0313. # Plugin Introduction dsh-cache-hit-precision targets the dsh web platform (the `dsh. property in package.json.