feat: add validation for minimum length on various fields and update type definitions

backend/pyproject.toml

@@ -41,12 +41,11 @@ dev = [
 
 [tool.mypy]
 python_version = "3.12"
-ignore_missing_imports = true
-warn_unused_ignores = true
-warn_redundant_casts = true
-warn_unused_configs = true
-check_untyped_defs = true
+strict = true
 plugins = ["pydantic.mypy"]
+files = ["app", "scripts"]
+mypy_path = ["typings"]
+show_error_codes = true
 
 [tool.pytest.ini_options]
 asyncio_default_fixture_loop_scope = "function"