v2.27.2 2024-12-18

What's Changed

• fix linux PGO wheel build by @davidhewitt in #1557
• Forward default_value calls to the underlying schema for DefinitionRefValidator by @Viicos in #1573
• Include JSON Schema input core schema in function schemas by @Viicos in #1572
• fix ValueError on year zero by @davidhewitt in #1583

Full Changelog: v2.27.1...v2.27.2