Add USB-C, Ethernet, and PoE interface class certifiers (2.61.0).

Dedicated deterministic engines certify class and connection integrity
(CC1/CC2, Rd 5.1 kΩ, VBUS/GND, SuperSpeed if USB3; 10/100 vs GbE
magnetics; PoE only with evidence). Missing evidence is INSUFFICIENT
or N/A, never invented PoE, SuperSpeed, Z, or I. No FEM, no via IPC.

tests/test_placement_check.py

@@ -48,7 +48,7 @@ def test_simple_project_without_pcb_has_no_ps_plc():
 
 def test_simple_project_eval_has_no_placement_keys():
     scores = eval_simple_project(SIMPLE)
-    assert scores.finding_count == 3
+    assert scores.finding_count == 10
     assert scores.precision == 1.0
     assert scores.recall == 1.0
     assert not any(k.startswith("PE-PLC-") for k in scores.extra_keys)