P3-1: Replace envSchema.parse() with safeParse() + default fallback to
avoid module-level crash when env vars are missing.
P3-3: Add fs.existsSync check on ECAPA_TDNN_MODEL_PATH at startup
with warning log when model path is missing.
P3-4: Add Zod strict() mode to env schema to catch typos in env
var names (extra keys now produce validation errors).
P1-6: Confirmed resolved - voiceprint.service.ts already imports
VoiceEnrollment/VoiceAnalysis from @shieldai/db (consolidated package).
Michael Freno
2d0611c2c9