QR Codes

backend/migrations/20260716135845_qr_token.down.sql

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+DROP TABLE qr_codes;

backend/migrations/20260716135845_qr_token.sql

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+CREATE TABLE qr_codes (
+    id INT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    user_id SMALLINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    token_hash VARCHAR(255) NOT NULL UNIQUE,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX idx_qr_token_hash ON qr_codes(token_hash);