Declare packaging extra for coverage; bump minimum Python

doc/changes/DM-47159.bugfix.md

@@ -1 +1,3 @@
 Makes coverage package optional and lazy-loads it only when needed.
+Declares packaging extra for coverage, i.e., `pip install lsst-ctrl-mpexec[coverage]`.
+Updates minimum supported Python to 3.11 (dependency-driven change).

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "lsst-ctrl-mpexec"
-requires-python = ">=3.10.0"
+requires-python = ">=3.11.0"
 description = "Pipeline execution infrastructure for the Rubin Observatory LSST Science Pipelines."
 license = {text = "BSD 3-Clause License"}
 readme = "README.rst"
@@ -16,8 +16,9 @@ classifiers = [
     "License :: OSI Approved :: BSD License",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Scientific/Engineering :: Astronomy",
 ]
 keywords = ["lsst"]
@@ -38,6 +39,7 @@ dynamic = ["version"]
 "Homepage" = "https://github.com/lsst/ctrl_mpexec"
 
 [project.optional-dependencies]
+coverage = ["coverage"]
 test = ["pytest >= 3.2"]
 
 [tool.setuptools.packages.find]

python/lsst/ctrl/mpexec/cli/cmd/commands.py

@@ -148,9 +148,7 @@ def coverage_context(kwargs: dict[str, Any]) -> Iterator[None]:
     try:
         import coverage
     except ModuleNotFoundError:
-        raise click.ClickException(
-            "coverage was requested but the coverage package is not installed."
-        )
+        raise click.ClickException("coverage was requested but the coverage package is not installed.")
     with NamedTemporaryFile("w") as rcfile:
         rcfile.write(
             """

python/lsst/ctrl/mpexec/cli/opt/options.py

@@ -54,7 +54,9 @@
     "--debug", help="Enable debugging output using lsstDebug facility (imports debug.py).", is_flag=True
 )
 
-coverage_option = MWOptionDecorator("--coverage", help="Enable coverage output.", is_flag=True)
+coverage_option = MWOptionDecorator(
+    "--coverage", help="Enable coverage output (requires coverage package).", is_flag=True
+)
 
 coverage_report_option = MWOptionDecorator(
     "--cov-report/--no-cov-report",