fix(workspace): preserve scoped projects after main sync #17063

Job	Run time
Resolve runner profiles	12s
Detect validation scopes	19s
Static gate	16s
Workspace unit tests	1m 32s
UI P0 (project-runtime)	9m 9s
Web workspace tests	8m 55s
Windows tools-pack payload tests	2m 13s
UI P0 (project-workspace)	9m 22s
Playwright visual (settings-workspace)	6m 41s
Playwright visual (entry-navigation)	4m 56s
Preflight	3m 54s
UI P0 (workspace-restoration)	9m 40s
UI P0 (entry-settings)	9m 36s
E2E Vitest	4m 56s
Playwright critical (${{ matrix.group }})	0s
Validate workspace	4s
Runtime summary	5s
	1h 11m 50s

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