Added log message for who is being sent expected checkin notifications

[marcusmoore]

Description

This tiny/targeted PR adds a log entry for each of the email addresses that receive an expected checkin alert.

Type of change

• New feature (non-breaking change which adds functionality) (ish)

[what-the-diff]

PR Summary

• Inclusion of Log Class
  The updated code now incorporates a new class named Log from a library called Illuminate\Support\Facades specific to our application. This will enhance our program's ability to keep track of its operations.

• Addition of Log Statement for ExpectedCheckinNotification
  The programmer has added a logging function in a file named SendExpectedCheckinAlerts.php. This will record the instances of sending out ExpectedCheckinNotification to users assigned to specific tasks. This additional feature will improve our monitoring and understanding of user-based notifications.