Add AF trace analysis after PCB checks (2.63.5).

Trigger λ/10 and tr/(6 tpd) from FACT; pairs analyzed together; Z only from
datasheet; visible INSUFFICIENT skips; lossless RLGC cascade (no OpenEMS).

tests/af_ai/test_af_ai_hf.py

@@ -188,12 +188,15 @@ def test_pcb_pipeline_af_ai_is_after_run_pcb_checks():
 
     src = inspect.getsource(pcb_pipeline.run_pcb_pipeline)
     assert "run_pcb_checks" in src
+    assert "check_af_traces" in src
     assert "_run_af_ai_section" in src
-    assert src.find("run_pcb_checks") < src.find("_run_af_ai_section")
+    assert src.find("run_pcb_checks") < src.find("check_af_traces")
+    assert src.find("check_af_traces") < src.find("_run_af_ai_section")
     checks = inspect.getsource(pcb_checks.run_pcb_checks)
     assert '("si_check"' in checks or '"si_check"' in checks
     assert '"hf_line"' in checks
     assert "af_ai" not in checks
+    assert "check_af_traces" not in checks
     assert "investigate_hf_hypotheses" not in checks