fix(wafer): derive family sensor counts from YAML layouts, bound frame decode to layout

tests/test_family_spec.py

@@ -1,4 +1,8 @@
-"""Tests for the shared wafer family sensor-count lookup."""
+"""Tests for the shared wafer family sensor-count lookup.
+
+Real counts, one per YAML layout file — this is the ground truth every
+caller (streaming decode, NVRAM parsing, CSV column count) must agree on.
+"""
 from pygui.backend.wafer.family_spec import sensor_count_for
 
 
@@ -6,18 +10,27 @@ def test_x_family_returns_80():
     assert sensor_count_for("X") == 80
 
 
-def test_p_family_returns_244():
-    assert sensor_count_for("P") == 244
+def test_aep_family_returns_48():
+    for code in ("A", "E", "P"):
+        assert sensor_count_for(code) == 48
 
 
-def test_other_known_families_return_244():
-    for code in ("A", "B", "C", "D", "E", "F"):
-        assert sensor_count_for(code) == 244
+def test_bcd_family_returns_29():
+    for code in ("B", "C", "D"):
+        assert sensor_count_for(code) == 29
 
 
-def test_unknown_family_returns_244():
-    assert sensor_count_for("Z") == 244
+def test_f_family_returns_22():
+    assert sensor_count_for("F") == 22
 
 
-def test_empty_string_returns_244():
-    assert sensor_count_for("") == 244
+def test_z_family_returns_65():
+    assert sensor_count_for("Z") == 65
+
+
+def test_unknown_family_returns_zero():
+    assert sensor_count_for("Q") == 0
+
+
+def test_empty_string_returns_zero():
+    assert sensor_count_for("") == 0