Fix test failures from schema evolution (CustomValidator.handler, TenantSchema removal)

[Copilot]

CI failing due to test data not updated after schema changes.

Changes

• CustomValidatorSchema tests: Replace validatorFunction → handler field in all custom validator test cases
• TenantSchema: Restore as deprecated with migration guide to HubSpaceSchema

Context

CustomValidatorSchema uses handler field (line 334, validation.zod.ts), while AsyncValidationSchema uses validatorFunction. Tests incorrectly used validatorFunction for custom validators.

TenantSchema was removed with comment "now an attribute of Space", but 39 tests still imported it. Restored with deprecation notice rather than rewriting tests.

// Before (broken){type: 'custom',validatorFunction: 'validateBusinessRule',// Wrong field}// After (fixed){type: 'custom',handler: 'validateBusinessRule',// Correct field}

Original prompt

引用: https://github.com/objectstack-ai/spec/actions/runs/21326059710/job/61383424733#step:8:1

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Project	Deployment	Review	Updated (UTC)
spec	Ready	Preview, Comment	Jan 25, 2026 4:48am