refactor: migrate to keyword-based repository config, add nested transactions and tests

tests/test_settings.py

@@ -1,12 +1,12 @@
 import pytest
 from pydantic import ValidationError
 
-from metaorm import DatabaseSettings
+from metaorm import RepositorySettings
 
 
-class TestDatabaseSettings:
+class TestRepositorySettings:
     def test_default_values(self) -> None:
-        settings = DatabaseSettings()
+        settings = RepositorySettings()
 
         assert settings.dsn == "sqlite+aiosqlite:///db.sqlite3"
         assert settings.pool_size == 5
@@ -14,7 +14,7 @@ class TestDatabaseSettings:
         assert settings.pool_timeout == 60
 
     def test_custom_values(self) -> None:
-        settings = DatabaseSettings(
+        settings = RepositorySettings(
             dsn="postgresql+asyncpg://user:pass@localhost/db",
             pool_size=10,
             pool_recycle=120,
@@ -28,7 +28,7 @@ class TestDatabaseSettings:
 
     def test_dsn_must_match_pattern(self) -> None:
         with pytest.raises(ValidationError):
-            DatabaseSettings(dsn="invalid_dsn")
+            RepositorySettings(dsn="invalid_dsn")
 
     @pytest.mark.parametrize(
         "field_name,invalid_value",
@@ -44,4 +44,4 @@ class TestDatabaseSettings:
         invalid_value: int,
     ) -> None:
         with pytest.raises(ValidationError):
-            DatabaseSettings(**{field_name: invalid_value})
+            RepositorySettings(**{field_name: invalid_value})