feat: add integration tests for initialization flow

- Implemented end-to-end integration tests covering database reset, bootstrap admin creation, demo user provisioning, scenario installation, and general creation.
- Added support for deterministic seeding and auto admin general creation.
- Created a new package for integration tests with necessary configurations and scripts.
- Updated various modules to support new features, including admin user handling and scenario seeding.
- Enhanced error handling and validation in the join and orchestrator modules.

tools/integration-tests/tsconfig.json

@@ -0,0 +1,8 @@
+{
+    "extends": "../../tsconfig.base.json",
+    "compilerOptions": {
+        "types": ["node"],
+        "noEmit": true
+    },
+    "include": ["test/**/*.ts"]
+}