add pytest_crds as an entrypoint

pyproject.toml

@@ -46,6 +46,9 @@ tracker = "https://github.com/spacetelescope/stpipe/issues"
 [project.entry-points."asdf.resource_mappings"]
 stpipe = "stpipe.integration:get_resource_mappings"
 
+[project.entry-points.pytest11]
+report_crds_context = "crds.pytest_crds.plugin"
+
 [project.scripts]
 stpipe = "stpipe.cli.main:main"
 strun = "stpipe.cli.strun:main"

src/stpipe/pytest_crds/plugin.py

@@ -0,0 +1,17 @@
+def pytest_addoption(parser):
+    parser.addoption(
+        "--report-crds-context",
+        action="store_true",
+        help="Report CRDS context in test suite header",
+    )
+
+
+def pytest_report_header(config):
+    """Add CRDS_CONTEXT to pytest report header"""
+
+    if config.getoption("report_crds_context"):
+        from stpipe.crds_client import get_context_used
+
+        return f"crds_context: {get_context_used('jwst')}"
+    else:
+        return []