feat(auth): add POST /login with Playwright automation and SQLite session storage

- automates file-key login on the ID portal using Playwright/Chromium
- captures token, cookies, and localStorage after successful redirect
- stores session data in SQLite via TypeORM (better-sqlite3)
- sessions are keyed by sessionName (auto-generated UUID if not provided)
- login URL, cabinet redirect URL, keys dir, and DB path are all configurable via env

.env.example

@@ -2,3 +2,13 @@ NODE_ENV=development
 PORT=3000
 APP_NAME=liquio-qa-bot
 APP_VERSION=1.0.0
+
+# Directory (relative to cwd) containing *.json key descriptors
+KEYS_DIR=keys
+
+# SQLite database path
+DB_PATH=data/sessions.db
+
+# Login automation targets
+ID_LOGIN_URL=https://id-liquio-diia-stg.kitsoft.ua/
+CABINET_URL=https://cabinet-liquio-diia-stg.kitsoft.ua/messages