Add CLI install handoff diagnostics

[luca-ctx]

Summary:

• bump CLI release crates to 0.18.0
• attach hosted installer handoff IDs to CLI events without leaking marker contents into properties
• emit setup start/completion analytics and preserve install handoff IDs across managed upgrades

Checks:

• cargo test --workspace
• bash scripts/check.sh --mode=ci
• cargo fmt --check --all
• git diff --check