[refactor] fixes issue #948 nit fix /api/health_lockdown redundant ternary

[MichaelWheeley]

What does this PR do?

• fixes [refactor] /api/health lockdown nit fix needed #948
• removes redundant ternary isAuthed ? {...} : {...} inside outer condition that guarantees isAuthed === true

basic validation performed,

• http://localhost:3001/api/health
• http://localhost:3001/api/health?key=password
• curl -i http://localhost:3001/api/health
• curl -i http://localhost:3001/api/health?key=password

Type of change

• Bug fix
• New feature
• Performance improvement
• Refactor / code cleanup
• Documentation
• Translation
• Map layer plugin

[accius]

LGTM. Verified: the entire object inside ...(isAuthed ? {...} : {}) is gated, so the inner isAuthed ? a : b ternaries on persistence, sessions, and pskMqttProxy.activeCallsigns were dead branches — the unauthenticated arms were unreachable. Removing them is a strict simplification with no behavior change for either authed or unauthed callers. Consolidating the SECURITY comment up top reads well too.