docs: improve package description

Author: O2eg

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "pg-workload"
 version = "0.3.0"
-description = "PostgreSQL backend activity emulator for diverse plans, logs, and runtime statistics."
+description = "PostgreSQL workload emulator for diagnostic and observability testing"
 readme = "README.md"
 requires-python = ">=3.10"
 license = "MIT"