fix: fix ccip api with empty room start and end time

[baby230211]

Types of changes

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• [x] Bugfix
• [ ] New feature
• [ ] Refactoring
• [ ] Breaking change (any change that would cause existing functionality to not work as expected)
• [ ] Documentation Update
• [ ] Other (please describe)

Description

Describe what the change is fix ccip api server error with empty room and start end time

Related Issue

1095