Improve api/schema code conversion

[elct9620]

Is your feature request related to a problem? Please describe.

N/A

Describe the solution you'd like

目前 export 出來的 Schema 物件並不統一，有大寫跟小寫開頭混合的狀況

CCIP-Serverless/api/schema/attendee.ts

Lines 3 to 9 in ab60d85

	export type AttendeeMetadata = z.infer<typeof attendeeMetadataSchema>
	export const attendeeMetadataSchema = z.record(z.any())
	export type BasicAttendeeInfo = z.infer<typeof basicAttendeeInfoSchema>
	export const basicAttendeeInfoSchema = z.object({
	nickname: z.string()
	})

應該要統一為都用小寫或者大寫開頭

Describe alternatives you've considered

N/A

Additional context

N/A