v3.32.4: rebuild the link on card insertion (the first attempt)

v3.32.2 fixed the endless re-arm, but on Windows the first attempt
still failed on the old link (seen in the confirmation log: the
"self._con.connect()" traceback) and only the retry recovered - a failed
init, a 2-4 s delay and a traceback in the log.

The monitor's insert path now marks the transport stale under
_CARD_LOCK, so the first equip attempt rebuilds the PC/SC link.  It also
covers a link created at a cardless startup (never connected).  The
rebuild still happens in the equip worker, never in the pyscard monitor
thread, and _ensure_transport releases the old link first.

Docs: the READMEs' troubleshooting bullet.
Tests: an insertion marks the transport for the rebuild.
1014 Python + 953 frontend green; simple-v462.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysim-simple-server"
-version = "3.32.2"
+version = "3.32.4"
 description = "HTTP REST server wrapping pysim for the SIMple PWA"
 license = { text = "GPL-2.0-or-later" }
 requires-python = ">=3.9"