Flatten application into repository root

database/migrations/001_account_activation.sql

@@ -0,0 +1,20 @@
+-- Run once against an existing PnPaaS database.
+-- Existing active/suspended accounts remain unchanged.
+ALTER TABLE users
+    MODIFY status ENUM('pending', 'active', 'suspended') NOT NULL DEFAULT 'pending';
+
+CREATE TABLE IF NOT EXISTS account_activation_tokens (
+    id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+    user_id BIGINT UNSIGNED NOT NULL,
+    token_hash CHAR(64) NOT NULL,
+    expires_at DATETIME NOT NULL,
+    used_at DATETIME NULL,
+    requested_ip VARCHAR(45) NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (id),
+    UNIQUE KEY uq_account_activation_token_hash (token_hash),
+    KEY idx_account_activation_user (user_id),
+    KEY idx_account_activation_expiry (expires_at),
+    CONSTRAINT fk_account_activation_user FOREIGN KEY (user_id) REFERENCES users (id)
+        ON UPDATE CASCADE ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;