Face Match Similarity Threshold LIVE — no redeploy
Minimum cosine similarity (0.00 – 1.00) required to accept a face match
during attendance marking (/api/mark-attendance-auto). Current
default: 0.70. Lower = more lenient (more false accepts),
higher = stricter (more false rejects).
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Changes take effect within 30 seconds on the live backend — no Railway redeploy needed.