feat(telemetry): honest wizard connect metric + v7 churn instrumentation (Spec 080) #2263

Job	Run time
Build Frontend	24s
OAuth E2E Tests	47s
Cross-Platform Logging Tests (macos-latest, $HOME/Library/Logs/mcpproxy, macOS File System Progra...	36s
End-to-End Tests (ubuntu-latest, 1.25)	11m 14s
Cross-Platform Logging Tests (ubuntu-latest)	1m 38s
Cross-Platform Logging Tests (windows-latest, $env:LOCALAPPDATA\mcpproxy\logs, Windows Applicatio...	1m 31s
Integration Tests	5m 12s
Stress Tests	0s
	21m 22s

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