fix(workspace): preserve scoped projects after main sync #17046

Job	Run time
Resolve runner profiles	11s
Static gate	32s
Detect validation scopes	23s
Preflight	3m 57s
Workspace unit tests	1m 57s
Web workspace tests	8m 51s
E2E Vitest	4m 53s
Playwright visual (entry-navigation)	4m 8s
Playwright visual (settings-workspace)	6m 35s
Windows tools-pack payload tests	2m 20s
UI P0 (project-runtime)	14m 26s
UI P0 (entry-settings)	14m 28s
UI P0 (workspace-restoration)	14m 26s
UI P0 (project-workspace)	14m 16s
Playwright critical (${{ matrix.group }})	-1s
Validate workspace	2s
Runtime summary	4s
	1h 31m 28s

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