Send SSO connections for server in statistics

[harminius]

Include the total count of SSO connections for the server in the statistics.

0 for CEs

[coveralls]

Pull Request Test Coverage Report for Build 14221056311

Details

• 5 of 5 (100.0%) changed or added relevant lines in 3 files are covered.
• 17 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.03%) to 92.323%

---

Files with Coverage Reduction	New Missed Lines	%
server/mergin/auth/app.py	1	98.46%
server/mergin/auth/models.py	1	98.6%
server/mergin/auth/controller.py	15	93.68%

Totals
Change from base Build 14215026834:	0.03%
Covered Lines:	6867
Relevant Lines:	7438

---

💛 - Coveralls