feat(sim): reject wrong-protocol tags in start_14a/start_15693; export tags; uid getter

- start_14a now raises TypeError for a non-Tag14443A transponder, start_15693
  likewise for a non-Tag15693 (local imports to avoid the base<->sim circular
  import). Prevents silently starting a sim with an incompatible tag model.
- Re-export the full 14a/14b/15693 tag lineup (NTAG21x, Ultralight family, NTAG
  I2C, ST25*, OPTIGA, ISO14443B, TI parts) from pm3py.sim for `from pm3py.sim
  import NTAG213`-style use.
- Add a read-only `uid` property on the Transponder base (mirrors set_uid()).
- Tests for both guards.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_sim_trace_14a.py

@@ -115,3 +115,25 @@ def test_14a_entries_accumulate_and_clear():
     assert [e["direction"] for e in s.entries] == [0, 1]
     s.clear()
     assert s.entries == []
+
+
+def test_start_14a_rejects_non_14443a_tag():
+    """A 15693 (or any non-Tag14443A) transponder must be refused up front."""
+    import pytest
+    from pm3py.sim import Icode3Tag
+
+    s = SimSession()
+    s._port = MagicMock()   # would otherwise fail on port resolution
+    with pytest.raises(TypeError, match="ISO 14443-A"):
+        s.start_14a(Icode3Tag(uid=None))
+
+
+def test_start_15693_rejects_non_15693_tag():
+    """Symmetric guard: a 14443-A tag must be refused by start_15693."""
+    import pytest
+    from pm3py.sim import NTAG213
+
+    s = SimSession()
+    s._port = MagicMock()
+    with pytest.raises(TypeError, match="ISO 15693"):
+        s.start_15693(NTAG213())