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

tests/test_data_parser.py

@@ -42,8 +42,13 @@ class TestCsvColumnCount:
     def test_x_family(self):
         assert csv_column_count("X") == 80
 
+    def test_z_family(self):
+        # Z has a real YAML layout (zwafer.yaml) — not "unknown" like the
+        # old hardcoded table implied by omitting it.
+        assert csv_column_count("Z") == 65
+
     def test_unknown_family_returns_zero(self):
-        assert csv_column_count("Z") == 0
+        assert csv_column_count("Q") == 0
 
     def test_empty_string_returns_zero(self):
         assert csv_column_count("") == 0
@@ -134,11 +139,11 @@ class TestParseBinaryData:
         assert result is not None
         assert len(result) == 1
 
-    def test_p_family_single_block_row_has_244_sensors(self):
+    def test_p_family_single_block_row_has_48_sensors(self):
         data = _make_p_block(1)
         result = parse_binary_data(data, "P")
         assert result is not None
-        assert len(result[0]) == 244
+        assert len(result[0]) == 48
 
     def test_p_family_two_blocks_returns_two_rows(self):
         data = _make_p_block(2)
@@ -170,7 +175,7 @@ class TestParseBinaryData:
         data = _make_p_block(1)
         result = parse_binary_data(data, "A")
         assert result is not None
-        assert len(result[0]) == 244
+        assert len(result[0]) == 48
 
     def test_empty_bytes_returns_empty_list(self):
         result = parse_binary_data(b"", "P")