Fix JSON Schema reference collection with "examples" keys

[Viicos]

Change Summary

Backport of #11305.

Related issue number

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

[cloudflare-workers-and-pages]

Deploying pydantic-docs with    Cloudflare Pages

Latest commit:	672e369
Status:	✅  Deploy successful!
Preview URL:	https://81b33700.pydantic-docs.pages.dev
Branch Preview URL:	https://backport-11305.pydantic-docs.pages.dev

View logs

[codspeed-hq]

CodSpeed Performance Report

Merging #11325 will degrade performances by 29.82%

_{Comparing backport-11305 (672e369) with main (14d14b0)}

🎉 Hooray! pytest-codspeed just leveled up to 2.2.1!

A heads-up, this is a breaking change and it might affect your current performance baseline a bit. But here's the exciting part - it's packed with new, cool features and promises improved result stability 🥳!
Curious about what's new? Visit our releases page to delve into all the awesome details about this new version.

Summary

❌ 35 regressions
✅ 8 untouched benchmarks
⁉️ 2 dropped benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⁉️	test_getattr	54.4 µs	N/A	N/A
⁉️	test_setattr	86.1 µs	N/A	N/A
❌	test_schema_build	2.9 ms	3.3 ms	-13.46%
❌	test_fastapi_startup_perf	200.1 ms	250.6 ms	-20.14%
❌	test_fastapi_startup_perf	26.2 ms	30.6 ms	-14.44%
❌	test_complex_model_schema_generation	1.8 ms	2.6 ms	-29.82%
❌	test_construct_dataclass_schema	1.8 ms	2.2 ms	-16.79%
❌	test_lots_of_models_with_lots_of_fields	2.7 s	3.3 s	-19.09%
❌	test_model_validators_serializers	906.8 µs	1,033.7 µs	-12.27%
❌	test_nested_model_schema_generation	1.1 ms	1.3 ms	-11.2%
❌	test_recursive_model_schema_generation	1 ms	1.3 ms	-18.94%
❌	test_simple_model_schema_generation	746.6 µs	893.6 µs	-16.46%
❌	test_simple_model_schema_lots_of_fields_generation	28.5 ms	38.5 ms	-25.83%
❌	test_tagged_union_with_callable_discriminator_schema_generation	1.5 ms	1.9 ms	-24.12%
❌	test_tagged_union_with_str_discriminator_schema_generation	1.5 ms	1.8 ms	-12.74%
❌	test_deeply_nested_recursive_model_schema_generation	1.3 ms	1.5 ms	-13.6%
❌	test_generic_recursive_model_schema_generation	896.9 µs	1,063.6 µs	-15.68%
❌	test_nested_recursive_generic_model_schema_generation	1.7 ms	2.2 ms	-21.62%
❌	test_nested_recursive_model_schema_generation	1.8 ms	2.2 ms	-16.35%
❌	test_recursive_discriminated_union_with_base_model	1.7 ms	2 ms	-14%
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
pydantic
json_schema.py
Project Total

This report was generated by python-coverage-comment-action