[#1354] Close pytest rerun socket resources during xdist runs

Add local pytest cleanup for ResourceWarning messages emitted when running the
test suite with pytest-xdist and pytest-rerunfailures.  The rerunfailures plugin
creates localhost sockets to coordinate rerun state between the xdist controller
and workers, but version 16.1 does not close all of those sockets before Python
interpreter shutdown.

Update src/conftest.py to close the plugin-owned failures_db socket during
pytest_unconfigure().  Also wrap pytest-rerunfailures ServerStatusDB connection
handling so accepted server-side sockets are closed when their handler exits.
This preserves rerunfailures behavior while preventing unclosed socket warnings
during parallel pytest runs.

Also keep reportconf.py loading inside a context manager so pytest-html report
configuration does not leave an open file handle.

Verified with:
- pytest -q -n 2 src/architecture/messaging/_UnitTest/test_CMsgTimeWritten.py
- pytest -q -n 2 src/simulation/environment/spiceInterface/_UnitTest/test_spiceThreadSafety.py
- pytest -n auto from src

Author: schaubh

src/conftest.py

@@ -35,6 +35,39 @@
     "The pytest option '--show_plots' has been deprecated for a year and will be removed shortly."
 )
 
+
+def _patch_rerunfailures_socket_cleanup():
+    """
+    Close pytest-rerunfailures server-side sockets when xdist is active.
+
+    pytest-rerunfailures 16.1 opens localhost sockets to coordinate reruns
+    between xdist workers, but accepted server connections are not closed by
+    the plugin.  This narrow patch preserves the plugin handler while ensuring
+    each accepted connection is closed when the handler exits.
+    """
+    try:
+        import pytest_rerunfailures
+    except ImportError:
+        return
+
+    server_status_db = getattr(pytest_rerunfailures, "ServerStatusDB", None)
+    if server_status_db is None:
+        return
+    if getattr(server_status_db, "_bsk_socket_cleanup_patched", False):
+        return
+
+    original_run_connection = server_status_db.run_connection
+
+    def run_connection_with_socket_close(self, conn):
+        with conn:
+            return original_run_connection(self, conn)
+
+    server_status_db.run_connection = run_connection_with_socket_close
+    server_status_db._bsk_socket_cleanup_patched = True
+
+
+_patch_rerunfailures_socket_cleanup()
+
 filename = inspect.getframeinfo(inspect.currentframe()).filename
 path = os.path.dirname(os.path.abspath(filename))
 print(path)
@@ -71,6 +104,17 @@ def pytest_terminal_summary(terminalreporter, exitstatus, config):
     terminalreporter.write_line(message, **{terminal_color: True}, bold=True)
 
 
+def pytest_unconfigure(config):
+    failures_db = getattr(config, "failures_db", None)
+    socket_handle = getattr(failures_db, "sock", None)
+    if socket_handle is None:
+        return
+    try:
+        socket_handle.close()
+    except OSError:
+        pass
+
+
 @pytest.fixture(scope="module")
 def show_plots(request):
     return request.config.getoption("--show_plots")