Add config and client injection with test reorganization.

Introduce typed config objects, optional adapter injection, and .env loading to simplify testing while preserving env-based defaults for production usage.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/unit/minio_config_test.py

@@ -0,0 +1,31 @@
+"""Unit tests for MinioConfig."""
+
+from __future__ import annotations
+
+import pytest
+
+from python_repositories.config import MinioConfig
+
+
+def test_from_env_loads_all_fields(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.setenv("MINIO_ENDPOINT", "localhost:9000")
+    monkeypatch.setenv("MINIO_ACCESS_KEY", "access")
+    monkeypatch.setenv("MINIO_SECRET_KEY", "secret")
+    monkeypatch.setenv("MINIO_BUCKET", "my-bucket")
+    config = MinioConfig.from_env(use_dotenv=False)
+    assert config.endpoint == "localhost:9000"
+    assert config.access_key == "access"
+    assert config.secret_key == "secret"
+    assert config.bucket == "my-bucket"
+    assert config.secure is False
+
+
+def test_from_env_raises_when_endpoint_missing(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.delenv("MINIO_ENDPOINT", raising=False)
+    monkeypatch.setenv("MINIO_ACCESS_KEY", "access")
+    monkeypatch.setenv("MINIO_SECRET_KEY", "secret")
+    monkeypatch.setenv("MINIO_BUCKET", "my-bucket")
+    with pytest.raises(Exception):
+        MinioConfig.from_env(use_dotenv=False)