v0.3.0

What's Changed

• Fixed race condition: retry with new random suffix on RecordNotUnique instead of crashing
• Added PostgreSQL-safe savepoints for retry logic
• Added support for NOT NULL slug columns (see README for setup)
• Changed set_slug to use save! instead of save (raises on validation errors)
• before_create and after_create callbacks re-run on retry — keep them idempotent

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What's Changed

• Fix race condition in slug generation by @rameerez in #3

Full Changelog: v0.2.0...v0.3.0