Check ImpedenceFinder against datasheet SI rules, not a dump table.

Each layout_rules SI requirement (diff/SE Z, skew, max length, spacing,
ref plane, vias, layer, return, series R) is one PASS/FAIL/MARGIN finding
with FACT and REQUIREMENT. USB/HDMI/PCIe/ETH/LVDS/DDR only; I2C GPIO CC
and analog REGN are skipped. No invented 90 Ω.

skills/extract-pintable/schema.json

@@ -66,7 +66,16 @@
               "decoupling_proximity",
               "thermal_via",
               "keepout",
-              "length_match"
+              "length_match",
+              "impedance",
+              "max_length",
+              "spacing",
+              "ref_plane",
+              "si_via",
+              "layer",
+              "series_resistor",
+              "return_path",
+              "si"
             ]
           },
           "pin": {"type": ["string", "null"]},
@@ -74,9 +83,20 @@
           "max_distance_mm": {"type": ["number", "null"]},
           "same_layer": {"type": ["boolean", "null"]},
           "min_via_count": {"type": ["integer", "null"]},
+          "max_via_count": {"type": ["integer", "null"]},
           "net_class": {"type": ["string", "null"]},
           "note": {"type": ["string", "null"]},
-          "source_page": {"type": ["integer", "null"]}
+          "source_page": {"type": ["integer", "null"]},
+          "z0_ohm": {"type": ["number", "null"]},
+          "zdiff_ohm": {"type": ["number", "null"]},
+          "tolerance_pct": {"type": ["number", "null"]},
+          "z_min_ohm": {"type": ["number", "null"]},
+          "z_max_ohm": {"type": ["number", "null"]},
+          "topology": {"type": ["string", "null"]},
+          "min_spacing_mm": {"type": ["number", "null"]},
+          "value_ohms": {"type": ["number", "null"]},
+          "ref_plane": {"type": ["string", "null"]},
+          "parameter": {"type": ["string", "null"]}
         },
         "required": ["kind"]
       }