fix(byok): harden the Windows DPAPI worker lifecycle #16980

Job	Run time
Resolve runner profiles	10s
Static gate	11s
Detect validation scopes	12s
Windows tools-pack payload tests	2m 19s
E2E Vitest	3m 29s
Preflight	3m 17s
Workspace unit tests	1m 41s
UI P0 (project-runtime)	7m 25s
UI P0 (workspace-restoration)	8m 15s
UI P0 (project-workspace)	8m 2s
UI P0 (entry-settings)	8m 34s
Playwright critical (${{ matrix.group }})	0s
Playwright visual (${{ matrix.name }})	0s
Web workspace tests	0s
Validate workspace	3s
Runtime summary	6s
	43m 44s

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