[BUG] HTTP 404 error (Not Found) reported for unrecognized date input to API

[elavy-harris]

Describe the bug
HTTP 404 error (Not Found) reported for unrecognized date input to API

To Reproduce
Steps to reproduce the behavior:

1. Issue a command like the following: curl -X GET -su elavy -k "https://localhost:8443/api/channels/5c19b0fe-251b-40ce-a376-51e5951ba96e/messages?startDate=2020-01-01T00%3A00%3A00Z" -H X-Requested-With:whatever
2. Observe that the response is a 404 error.

Expected behavior
A 400 error (Bad Request) is returned, preferably with information about what's bad

Actual behavior
A 404 (Not Found) error is returned.

Environment (please complete the following information):

• OS: Docker image
• Connect Version 4.5.0

Additional context
The API apparently requires milliseconds to be included in the date parameters and a timezone in "-0500" style. The swagger page (for all appropriate messages) should describe the required format, and the error message should at least indicate that the problem is a formatting issue with the date field.