Extract API, migrations and portable NAS deployment

database/migrations/002_delivery_changes_and_auth.sql

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+ALTER TABLE deliveries ADD COLUMN IF NOT EXISTS updated_at VARCHAR(24) NULL;
+ALTER TABLE deliveries ADD COLUMN IF NOT EXISTS cancelled_at VARCHAR(24) NULL;
+ALTER TABLE deliveries ADD COLUMN IF NOT EXISTS cancellation_reason VARCHAR(300) NULL;
+CREATE TABLE IF NOT EXISTS app_users (
+  id CHAR(36) CHARACTER SET ascii COLLATE ascii_bin PRIMARY KEY,
+  username VARCHAR(80) CHARACTER SET ascii COLLATE ascii_bin NOT NULL UNIQUE,
+  display_name VARCHAR(80) NOT NULL,
+  password_hash VARCHAR(256) NOT NULL,
+  role VARCHAR(20) NOT NULL DEFAULT 'staff',
+  active BOOLEAN NOT NULL DEFAULT TRUE,
+  created_at VARCHAR(24) NOT NULL
+);
+CREATE TABLE IF NOT EXISTS auth_sessions (
+  token_hash CHAR(64) CHARACTER SET ascii COLLATE ascii_bin PRIMARY KEY,
+  user_id CHAR(36) CHARACTER SET ascii COLLATE ascii_bin NOT NULL,
+  expires_at DATETIME(3) NOT NULL,
+  FOREIGN KEY (user_id) REFERENCES app_users(id),
+  INDEX sessions_user (user_id),
+  INDEX sessions_expiry (expires_at)
+);
+ALTER TABLE sync_operations ADD COLUMN IF NOT EXISTS actor_user_id CHAR(36) CHARACTER SET ascii COLLATE ascii_bin NULL;