fix(permissions): make yolo override auto mode

[TheGreatAxios]

Summary

• add --yolo as a process-only alias for skip permissions
• make yolo take precedence over auto policy while preserving catastrophic and path-keyed secret hard floors
• report and persist the actual active settings source across exec and TUI

Verification

• bun test src/config.test.ts src/permission/permission.test.ts tests/unit/exec/runner.test.ts src/tui/commands/built-in.test.ts src/tui/runner/wiring.skip-permissions-warning.test.ts passes
• bun run test passes
• bun run check passes

Fixes CL-8986

[linear-code]

CL-8986