fix(task-8): pin every transcribed standards row, not a sampled subset

The module docstring claimed "every value asserted here is a named row of a
named table", but the converse did not hold: 27 of the 83 shipped rows had a
dimension no test compared against a literal. ISO 4014/4017 M5 (s,k), ISO 4032
M5 (m), ISO 7089 M5 (d1,d2,h), ISO 4762 M4/M6/M10/M16 (dk,s,b) and D/B for 20
of the 33 ISO 15 bearings were constrained only by inequality tests (series
growth) and by the bore-number rule - never by the transcribed number. For a
task whose worst failure is "a standards table row that is not in the
standard", those rows were exactly where such a row would hide.

Measured before the fix with a pytest plugin that rewrote five rows in memory
(M5 hex bolt s=k=99, M5 nut, M5 washer, M16 socket screw dk=s=b=99, 6307 as
78x20 instead of 80x21): 32 passed in 0.07s. All five now fail.

Each of the five tables is pinned by an ISO*_ROWS dict literal carrying every
dimension of every shipped size, parametrized one case per size/designation,
plus a completeness test asserting the table's key set equals the literal's -
so a row added later without a pin is red too (verified: a fabricated M14 head
and 6011 bearing fail the completeness gate). 32 -> 93 tests, 0.06 -> 0.13 s.

No production code changed; no ActiveX member is involved, so no live probe was
required for this finding.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd

tests/test_mech_bearings.py

@@ -1,4 +1,10 @@
-"""ISO 15 boundary dimensions and the ISO 8826 representation conventions."""
+"""ISO 15 boundary dimensions and the ISO 8826 representation conventions.
+
+``ISO15_ROWS`` below pins d, D and B for *every* one of the 33 shipped
+designations, and a completeness test asserts its key set equals the module's.
+Inequality tests (series growth, the bore-number rule) constrain a row; only a
+literal pins it.
+"""
 
 from __future__ import annotations
 
@@ -17,32 +23,60 @@ from engineering.mech.standards.bearings import (
     list_bearings,
 )
 
+#: ISO 15:2017 Table 4 - every transcribed designation, (d, D, B) in mm.
+ISO15_ROWS: dict[str, tuple[float, float, float]] = {
+    # dimension series 10 (600x)
+    "6000": (10.0, 26.0, 8.0),
+    "6001": (12.0, 28.0, 8.0),
+    "6002": (15.0, 32.0, 9.0),
+    "6003": (17.0, 35.0, 10.0),
+    "6004": (20.0, 42.0, 12.0),
+    "6005": (25.0, 47.0, 12.0),
+    "6006": (30.0, 55.0, 13.0),
+    "6007": (35.0, 62.0, 14.0),
+    "6008": (40.0, 68.0, 15.0),
+    "6009": (45.0, 75.0, 16.0),
+    "6010": (50.0, 80.0, 16.0),
+    # dimension series 02 (620x)
+    "6200": (10.0, 30.0, 9.0),
+    "6201": (12.0, 32.0, 10.0),
+    "6202": (15.0, 35.0, 11.0),
+    "6203": (17.0, 40.0, 12.0),
+    "6204": (20.0, 47.0, 14.0),
+    "6205": (25.0, 52.0, 15.0),
+    "6206": (30.0, 62.0, 16.0),
+    "6207": (35.0, 72.0, 17.0),
+    "6208": (40.0, 80.0, 18.0),
+    "6209": (45.0, 85.0, 19.0),
+    "6210": (50.0, 90.0, 20.0),
+    # dimension series 03 (630x)
+    "6300": (10.0, 35.0, 11.0),
+    "6301": (12.0, 37.0, 12.0),
+    "6302": (15.0, 42.0, 13.0),
+    "6303": (17.0, 47.0, 14.0),
+    "6304": (20.0, 52.0, 15.0),
+    "6305": (25.0, 62.0, 17.0),
+    "6306": (30.0, 72.0, 19.0),
+    "6307": (35.0, 80.0, 21.0),
+    "6308": (40.0, 90.0, 23.0),
+    "6309": (45.0, 100.0, 25.0),
+    "6310": (50.0, 110.0, 27.0),
+}
 
-@pytest.mark.parametrize(
-    ("designation", "bore", "outer", "width"),
-    [
-        ("6000", 10.0, 26.0, 8.0),
-        ("6004", 20.0, 42.0, 12.0),
-        ("6006", 30.0, 55.0, 13.0),
-        ("6010", 50.0, 80.0, 16.0),
-        ("6200", 10.0, 30.0, 9.0),
-        ("6203", 17.0, 40.0, 12.0),
-        ("6205", 25.0, 52.0, 15.0),
-        ("6208", 40.0, 80.0, 18.0),
-        ("6210", 50.0, 90.0, 20.0),
-        ("6300", 10.0, 35.0, 11.0),
-        ("6305", 25.0, 62.0, 17.0),
-        ("6309", 45.0, 100.0, 25.0),
-        ("6310", 50.0, 110.0, 27.0),
-    ],
-)
-def test_named_rows_match_iso15(designation, bore, outer, width):
+
+@pytest.mark.parametrize(("designation", "expected"), sorted(ISO15_ROWS.items()))
+def test_named_rows_match_iso15(designation, expected):
     row = bearing(designation)
-    assert (row["d"], row["D"], row["B"]) == (bore, outer, width)
+    assert (row["d"], row["D"], row["B"]) == expected
     assert row["designation"] == designation
     assert row["source"] == SOURCE_ISO_15
 
 
+def test_every_shipped_bearing_is_pinned_by_a_literal():
+    """No shipped designation may escape the table above - that is where a wrong row hides."""
+    assert set(DEEP_GROOVE) == set(ISO15_ROWS)
+
+
 def test_bore_number_rule_holds_across_every_series():
     """ISO 15: bore 00/01/02/03 = 10/12/15/17 mm; 04 and up = 5 x bore number."""
     for series in ("60", "62", "63"):