docs(examples): optional children extension in wiki_data, and Beta classifier

[simontaurus]

• Development Status :: 3 - Alpha -> 4 - Beta, now that the binding has shipped in v1.0.0
• examples/wiki_data.py: three commented blocks marked "Extension, step N of 3" that add a to-many link (children, wdt:P40) on top of the existing to-one father - a context term, a LinkList field, and a read

Verified against the live endpoint in both states. As shipped it is unchanged. With all three uncommented:

children are fetched as one batch
  stored IRIs: ['Item:Q80', 'Item:Q60677509']
  resolved:    Item:Q80 - Tim Berners-Lee
  resolved:    Item:Q60677509 - Mike Berners-Lee

The read is on father, not on Q80: Tim Berners-Lee records no P40 of his own, his father records two.

OoldField() carries no range= - the annotation names the target and x-oold-range is derived from it.

[github-actions]

Release preview

No version bump from the current commits (stays at v1.0.0). Use conventional commit types (feat, fix, ...) to trigger a release.

Changelog preview (truncated)

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

[github-actions]

📊 Benchmark Results

Click to see benchmark comparison

📊 Benchmark Comparison (threshold: 1.3x)
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➖ Unchanged (within threshold):
  ➖ test_simple_dict_document_store: 0.0017s → 0.0017s (-0.1%)
  ➖ test_sqlite_document_store: 0.0018s → 0.0018s (+0.1%)
  ➖ test_local_sparql_store: 0.0327s → 0.0324s (-0.9%)
  ➖ test_oneof_subschema: 0.0519s → 0.0533s (+2.7%)
  ➖ test_enum_docstrings: 0.0451s → 0.0460s (+2.1%)
  ➖ test_subclass_inheritance: 0.0485s → 0.0483s (-0.4%)
  ➖ test_class_hierarchy: 0.0451s → 0.0462s (+2.5%)
  ➖ test_core[v1]: 0.0316s → 0.0315s (-0.1%)
  ➖ test_core[v2]: 0.0367s → 0.0382s (+4.1%)
  ➖ test_schema_generation[v1]: 0.0015s → 0.0015s (+0.2%)
  ➖ test_schema_generation[v2]: 0.0032s → 0.0033s (+3.2%)
  ➖ test_simple_json: 0.0006s → 0.0006s (-0.7%)
  ➖ test_complex_graph: 0.0013s → 0.0013s (+1.3%)

============================================================
Summary: 0 regressions, 0 improvements, 13 unchanged
============================================================

✅ No significant performance regressions

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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