chore(master): release idempotency-kit 0.5.0

[github-actions]

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0.5.0 (2026-10-16)

⚠ BREAKING CHANGES

• coordinate() and @async_idempotent raise IdempotencyValidationError for an empty key, which used to mean "no idempotency", and for a key or operation that is whitespace-only, contains ":" or is too long, which used to run the action unprotected. Pass None, not "", when a request carries no key, and map IdempotencyValidationError to HTTP 400.

Features

• let the coordinator fail closed when the idempotency store is unavailable (#55) (c23aad6), closes #53

Bug Fixes

• raise on an invalid idempotency key instead of running the action unprotected (#54) (50c2fd3), closes #51
• renew the reservation while the action runs (#56) (e86c51f), closes #52

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[github-actions]

🤖 Created releases:

• idempotency-kit-v0.5.0

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