chore(deps-dev): bump schemathesis from 4.16.1 to 4.21.1 in /clients/python

[dependabot]

Bumps schemathesis from 4.16.1 to 4.21.1.

Release notes

Sourced from schemathesis's releases.

Release 4.21.1

🐛 Fixed

• Missing boundary negative in the coverage phase for boolean exclusiveMinimum / exclusiveMaximum.
• UnicodeEncodeError when failure or error output contains lone Unicode surrogate characters. #4229

Release 4.21.0

🚀 Added

• Chain GraphQL operations on non-id identifiers (fullPath, slug, ...) in stateful and fuzzing phases.

🏎️ Performance

• Much lower peak memory and faster validation for schemas with very large maxLength / maxItems.
• Cache failed validator builds to avoid recompiling invalid patterns from large maxLength / maxItems values.
• Update hypothesis-graphql to 0.13.0 that brings up to 180x performance improvements for deeply nested GraphQL schemas.
• Update harfile to 0.5.0 for slightly better performance.
• Lower memory usage in long stateful runs.
• Faster, lower-memory stateful state machine construction for large schemas.

🐛 Fixed

• Excessive re-runs in stateful testing against APIs with mutable state.
• Stateful testing restarting on a single transient transport failure (e.g. dropped connection).
• Semantic value substitution overwriting const / enum fields with invalid data.

🔧 Changed

• Mine additionalProperties: false from Pydantic extra_forbidden errors and the exception_detail validation envelope.

Release 4.20.3

🏎️ Performance

• Skip coverage generation for header and cookie parameters whose pattern requires a non-alphanumeric character.
• Faster operation ordering and case traversal in stateful testing for schemas with many operations.

🐛 Fixed

• Fuzzing phase marked as failed without any reported failure. #4209
• Generate maximum-length boundary cases for unanchored multi-part patterns with maxLength.
• Display the actual response time in milliseconds in max_response_time failures.

Release 4.20.2

🔧 Changed

• Re-raise original server exceptions in WSGI apps for distinct error deduplication. #1289

... (truncated)

Changelog

Sourced from schemathesis's changelog.

4.21.1 - 2026-06-06

🐛 Fixed

• Missing boundary negative in the coverage phase for boolean exclusiveMinimum / exclusiveMaximum.
• UnicodeEncodeError when failure or error output contains lone Unicode surrogate characters. #4229

4.21.0 - 2026-06-01

🚀 Added

• Chain GraphQL operations on non-id identifiers (fullPath, slug, ...) in stateful and fuzzing phases.

🏎️ Performance

• Much lower peak memory and faster validation for schemas with very large maxLength / maxItems.
• Cache failed validator builds to avoid recompiling invalid patterns from large maxLength / maxItems values.
• Update hypothesis-graphql to 0.13.0 that brings up to 180x performance improvements for deeply nested GraphQL schemas.
• Update harfile to 0.5.0 for slightly better performance.
• Lower memory usage in long stateful runs.
• Faster, lower-memory stateful state machine construction for large schemas.

🐛 Fixed

• Excessive re-runs in stateful testing against APIs with mutable state.
• Stateful testing restarting on a single transient transport failure (e.g. dropped connection).
• Semantic value substitution overwriting const / enum fields with invalid data.

🔧 Changed

• Mine additionalProperties: false from Pydantic extra_forbidden errors and the exception_detail validation envelope.

4.20.3 - 2026-05-29

🏎️ Performance

• Skip coverage generation for header and cookie parameters whose pattern requires a non-alphanumeric character.
• Faster operation ordering and case traversal in stateful testing for schemas with many operations.

🐛 Fixed

• Fuzzing phase marked as failed without any reported failure. #4209
• Generate maximum-length boundary cases for unanchored multi-part patterns with maxLength.
• Display the actual response time in milliseconds in max_response_time failures.

4.20.2 - 2026-05-28

🔧 Changed

• Re-raise original server exceptions in WSGI apps for distinct error deduplication. #1289

... (truncated)

Commits

• 9dec055 chore: Release 4.21.1
• b22d897 docs: Add Huma trophy case
• 861fe89 fix: UnicodeEncodeError when failure or error output contains lone Unicode ...
• a10f383 build(deps): bump github/codeql-action from 4.36.0 to 4.36.2
• e95f4a4 refactor: Flatten allOf structurally for dependency inference
• b78e48d refactor: Flatten allOf structurally for dependency inference
• e7f8ec0 fix: Missing boundary negative in the coverage phase for boolean `exclusiveMi...
• f3e329d chore: Release 4.21.0
• 17372a3 perf: Much lower peak memory and faster validation for schemas with very larg...
• 3761741 perf: Cache failed validator builds to avoid recompiling invalid patterns fro...
• Additional commits viewable in compare view

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[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[Al-Pragliola]

Running fuzz tests before approving https://github.com/kubeflow/hub/actions/runs/27142482150
/lgtm

[Al-Pragliola]

run failed, checking why

/hold

[dependabot]

Superseded by #2835.