fix(workspace): preserve scoped projects after main sync #17041

Job	Run time
Resolve runner profiles	12s
Detect validation scopes	20s
Static gate	17s
E2E Vitest	4m 38s
Workspace unit tests	1m 53s
Preflight	3m 37s
Web workspace tests	8m 40s
Windows tools-pack payload tests	2m 10s
Playwright visual (entry-navigation)	5m 1s
Playwright visual (settings-workspace)	5m 52s
UI P0 (project-runtime)	40m 0s
UI P0 (project-workspace)	36m 17s
UI P0 (entry-settings)	45m 21s
UI P0 (workspace-restoration)	23m 3s
Playwright critical (${{ matrix.group }})	0s
Validate workspace	4s
Runtime summary	3s
	2h 57m 28s

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