refactor: imports and reorganize domain structure

- Updated import statements across multiple modules to use relative imports for better encapsulation.
- Consolidated and organized the `__init__.py` files in various domain packages to expose necessary classes and functions.
- Improved code readability and maintainability by grouping related imports and removing unused ones.
- Ensured consistent import patterns across the domain, enhancing the overall structure of the codebase.

db/session.py

@@ -1,6 +1,6 @@
 from tortoise import Tortoise
 
-from domain.adapters.registry import runtime_registry
+from domain.adapters import runtime_registry
 
 TORTOISE_ORM = {
     "connections": {"default": "sqlite://data/db/db.sqlite3"},