feat: add support for email verification

backend/resources/migrations/sqlite/20260109090200_email_verification.down.sql

@@ -0,0 +1,8 @@
+PRAGMA foreign_keys= OFF;
+BEGIN;
+
+DROP TABLE email_verification_tokens;
+ALTER TABLE users DROP COLUMN email_verified;
+
+COMMIT;
+PRAGMA foreign_keys= ON;

backend/resources/migrations/sqlite/20260109090200_email_verification.up.sql

@@ -0,0 +1,24 @@
+PRAGMA foreign_keys= OFF;
+BEGIN;
+
+CREATE TABLE email_verification_tokens
+(
+    id         TEXT PRIMARY KEY,
+    created_at DATETIME NOT NULL,
+    token      TEXT     NOT NULL UNIQUE,
+    expires_at DATETIME NOT NULL,
+    user_id    TEXT     NOT NULL,
+    FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
+);
+
+ALTER TABLE users
+    ADD COLUMN email_verified BOOLEAN NOT NULL DEFAULT FALSE;
+
+UPDATE users
+SET email_verified =EXISTS (SELECT 1
+                            FROM app_config_variables
+                            WHERE key = 'emailsVerified'
+                              AND value = 'true');
+
+COMMIT;
+PRAGMA foreign_keys= ON;