fix(talkService): make attendees be synced with talk room members

[GVodyanov]

Fixes the following bug:

• have a talk room
• add this talk room to an event, and also an internal user that is not in the room yet, user confirms event participation
• expected: user gets automatically added to the room
• what happened: user not in the room, had to add him by hand

The issue was the / becoming encoded as a %2F

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/services/talkService.ts	0.00%	2 Missing ⚠️

📢 Thoughts on this report? Let us know!

[SebastianKrupinski]

If the issue was the / getting encoded, did you check if the other paths are okay? Like "room/${token}/participants"??

[GVodyanov]

If the issue was the / getting encoded, did you check if the other paths are okay? Like "room/${token}/participants"??

Where is that being used? @SebastianKrupinski

[SebastianKrupinski]

If the issue was the / getting encoded, did you check if the other paths are okay? Like "room/${token}/participants"??

Where is that being used? @SebastianKrupinski

During event create or update, in the talkService, first we create a room then we update the participants on save, but first we pull the existing participants