```

chore: refactor logging module, update genesis timestamp, remove model relationships, and reorganize routers

- Rename logging.py to logger.py and update import paths in poa.py and main.py
- Update devnet genesis timestamp to 1766828620
- Remove SQLModel Relationship declarations from Block, Transaction, and Receipt models
- Add SessionDep type alias and get_session dependency in coordinator-api deps
- Reorganize coordinator-api routers: replace explorer/registry with exchange, users, marketplace

assets/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "assets",
+  "version": "1.0.0",
+  "description": "",
+  "main": "tailwind.config.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "autoprefixer": "^10.4.23",
+    "postcss": "^8.5.6",
+    "tailwindcss": "^4.1.18"
+  }
+}