Port set to 0 instead of 443 when setting up a Google calendar thus no sync

### What Happened?

Set up my Google calendars via the Calendar app. The events weren't being synced. So I compared the config files in .config/evolution/sources with the files on my other machine, where I set up the calendar two years ago. One line was different: under `[Authentication]`, Port was set to 0 in the new config and 443 in the old (working) config. I set it to 443 on my new machine and it immediately worked.

### Steps to Reproduce

1. Set up google calendar sync from the Calendar app
2. Notice that events aren't synced
3. Edit port as described above
4. Notice that it works now

### Expected Behavior

Port should be set correctly.

### OS Version

8.x (Circe)

### Session Type

Secure Session (Wayland)

### Software Version

Latest release (I have run all updates)

### Log Output

_No response_

### Hardware Info

_No response_

Start by tracing Google calendar setup and how the configuration under .config/evolution/sources is generated, focusing on the [Authentication] Port value. Reproduce the setup, then verify that a newly created source uses port 443 and that calendar events sync without manual configuration edits.

Written by the indexing model from the issue text.