fix(v1): route json() dumps kwargs to json.dumps, not dict()

[simontaurus]

Regression since v1.0.0, reported downstream. LinkedBaseModel.json() of the v1 descriptor binding forwards every keyword to dict():

# src/oold/model/v1/_descriptor.py:342 at v1.0.2
encoder = kwargs.pop("encoder", None) or self.__json_encoder__
kwargs.pop("models_as_dict", None)
return json.dumps(self.dict(**kwargs), default=encoder)

pydantic v1 splits them: BaseModel.json() names the dict() arguments explicitly and collects the rest into **dumps_kwargs, which go to json.dumps. So a valid v1 call raises:

>>> p.json(exclude_none=True, exclude_defaults=True, indent=2)
TypeError: BaseModel.dict() got an unexpected keyword argument 'indent'

Same for sort_keys and separators. The legacy binding (OOLD_DESCRIPTOR_BINDING=0) is unaffected - src/oold/model/v1/__init__.py:723 keeps the explicit v1 signature.

Changes:

• split the dumps kwargs off before calling dict(), keyed on the arguments BaseModel.dict accepts
• add test_json_passes_dumps_kwargs_to_json_dumps to tests/test_compat_parity_v1.py; .json() had no coverage anywhere in the suite, which is how this shipped

734 passed under both bindings.

[github-actions]

Release preview

Merging this PR would release v1.0.3 (current: v1.0.2).

Changelog preview (truncated)

## v1.0.3 (2026-09-24)

### Bug Fixes

- **v1**: Route json() dumps kwargs to json.dumps, not dict()
  ([`41b65de`](https://github.com/OO-LD/oold-python/commit/41b65ded09e9f25c5986179909e1d46df67bf805))

_{Preview via python-semantic-release and conventional commits.}

[github-actions]

📊 Benchmark Results

Click to see benchmark comparison

📊 Benchmark Comparison (threshold: 1.3x)
============================================================

⚠️  Performance Regressions:
  ❌ test_core[v2]: 0.0717s → 0.1207s (+68.4%, ratio: 1.68x)

✅ Performance Improvements:
  ✅ test_enum_docstrings: 0.0544s → 0.0405s (-25.6%, ratio: 0.74x)
  ✅ test_core[v1]: 0.0501s → 0.0370s (-26.2%, ratio: 0.74x)

➖ Unchanged (within threshold):
  ➖ test_simple_dict_document_store: 0.0012s → 0.0013s (+13.1%)
  ➖ test_sqlite_document_store: 0.0013s → 0.0014s (+7.7%)
  ➖ test_local_sparql_store: 0.0230s → 0.0228s (-0.8%)
  ➖ test_oneof_subschema: 0.0716s → 0.0617s (-13.9%)
  ➖ test_subclass_inheritance: 0.0518s → 0.0493s (-4.8%)
  ➖ test_class_hierarchy: 0.0572s → 0.0503s (-12.1%)
  ➖ test_schema_generation[v1]: 0.0010s → 0.0012s (+15.5%)
  ➖ test_schema_generation[v2]: 0.0023s → 0.0024s (+2.3%)
  ➖ test_simple_json: 0.0004s → 0.0004s (-1.4%)
  ➖ test_complex_graph: 0.0010s → 0.0009s (-5.9%)

============================================================
Summary: 1 regressions, 2 improvements, 10 unchanged
============================================================

⚠️  Regressions detected but not failing build (informational only)

Threshold: 1.3x (30% slower triggers a regression warning)

Note: Benchmarks are informational only and won't fail the build.

_{💡 Tip: Download the benchmark-results artifact for detailed JSON data}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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