Implementing link checks

At this stage, we will implement the link checking functionality independent of serverless functions. Let's start with our object model and add the Status field to our link object with the possible values of pending, valid, and invalid. We define an alias type here called LinkStatus, and constants for the values. However, note that it is not a strongly typed enum like other languages; it is really just a string:

const (     LinkStatusPending = "pending"     LinkStatusValid   = "valid"     LinkStatusInvalid = "invalid" )  type LinkStatus = string  type Link struct {     Url         string     Title       string     Description string     Status      LinkStatus     Tags        map[string]bool     CreatedAt   time.Time     UpdatedAt   time.Time }

Let's also define a CheckLinkRequest object ...

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