Initial commit

backend/migrations/202510310000_create_magic_tokens/down.sql

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+DROP TABLE magic_tokens;
+DROP TYPE magic_token_kind;

backend/migrations/202510310000_create_magic_tokens/up.sql

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+CREATE TYPE magic_token_kind AS ENUM ('email_login', 'demo_login');
+
+CREATE TABLE magic_tokens (
+    id UUID PRIMARY KEY,
+    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    kind magic_token_kind NOT NULL,
+    token_hash VARCHAR NOT NULL UNIQUE,
+    metadata JSONB NOT NULL DEFAULT '{}'::jsonb,
+    expires_at TIMESTAMPTZ NOT NULL,
+    max_uses INTEGER,
+    used_count INTEGER NOT NULL DEFAULT 0,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    created_by UUID REFERENCES users(id) ON DELETE SET NULL,
+    last_used_at TIMESTAMPTZ
+);
+
+CREATE INDEX magic_tokens_token_hash_idx ON magic_tokens (token_hash);
+CREATE INDEX magic_tokens_expires_at_idx ON magic_tokens (expires_at);