Bump ruff line-length to 120 and reformat

Rejoins lines that only wrapped because they exceeded the old 88-char
limit; ruff check and the full test suite (725 passed) are unaffected.

tests/test_validate.py

@@ -57,9 +57,7 @@ def _loader(B: int = 4, n_batches: int = 2, n_sec_value: int = 0, n_classes: int
         sec_cont = torch.randn(B, _K_MAX, SEC_SLOT_DIM)
         proc_idx = torch.zeros(B, dtype=torch.long)
         sec_type_idx = torch.randint(0, n_classes, (B, _K_MAX), dtype=torch.long)
-        batches.append(
-            (cond_cont, cond_cat, x1, n_sec, sec_cont, proc_idx, sec_type_idx)
-        )
+        batches.append((cond_cont, cond_cat, x1, n_sec, sec_cont, proc_idx, sec_type_idx))
     return batches
 
 
@@ -71,9 +69,7 @@ def test_validate_marginals_all_zero_secondaries_returns_nan_phys_kl(monkeypatch
     s1, s2 = _tiny_models()
     loader = _loader(n_sec_value=0)
 
-    def _fake_resolve_n_sec(
-        stage1_model, sec_decoder, cond_cont, cond_cat, stage1_out, n_sec_pred
-    ):
+    def _fake_resolve_n_sec(stage1_model, sec_decoder, cond_cont, cond_cat, stage1_out, n_sec_pred):
         return torch.zeros(cond_cont.size(0), dtype=torch.long)
 
     monkeypatch.setattr("giant.validate.resolve_n_sec", _fake_resolve_n_sec)