test(core): extend coverage — console, errors, log, service, time, benchmark

Add missing test modules for previously untested core areas:
- console: ForegroundColorEnum, BackgroundColorEnum, Console methods
- errors: dependency_error, module_dependency_error
- log: LogLevel ordering/values, LogSettings, Logger (should_log, format, file write, fatal)
- service: HostedService, StartupTask, CronjobABC (start/stop/loop/task cancellation)
- time: TimeFormatSettings properties and setters
- utils: Benchmark.time / .memory / .all call-count and output

Also fix existing test files: environment cleanup, cron exception specificity,
json_processor kwargs bug doc, configuration_model_abc to_dict bug doc.
All 199 tests pass, black clean.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

test/core/configuration/configuration_model_abc_test.py

@@ -32,6 +32,7 @@ class EnvSettings(ConfigurationModelABC):
 
 # --- option() / defaults ---
 
+
 def test_default_values():
     s = DatabaseSettings()
     assert s.host == "localhost"
@@ -79,6 +80,7 @@ def test_type_casting_bool():
 
 # --- required ---
 
+
 def test_required_field_present():
     s = RequiredSettings({"api_key": "abc123"})
     assert s.api_key == "abc123"
@@ -91,6 +93,7 @@ def test_required_field_missing_raises():
 
 # --- readonly ---
 
+
 def test_readonly_raises_on_setattr():
     s = DatabaseSettings()
     with pytest.raises(AttributeError, match="read-only"):
@@ -105,6 +108,7 @@ def test_mutable_settings_can_be_set():
 
 # --- env override ---
 
+
 def test_env_prefix_override(monkeypatch):
     monkeypatch.setenv("MYAPP_SECRET", "env_secret_value")
     s = EnvSettings()
@@ -123,8 +127,33 @@ def test_env_no_prefix_override(monkeypatch):
     assert s.host == "env_host"
 
 
+def test_camel_case_key():
+    s = DatabaseSettings({"hostName": "camelhost"})
+
+    class CamelSettings(ConfigurationModelABC):
+        def __init__(self, src=None):
+            ConfigurationModelABC.__init__(self, src or {})
+            self.option("host_name", str, default=None)
+
+    obj = CamelSettings({"hostName": "camelhost"})
+    assert obj.host_name == "camelhost"
+
+
+# --- to_dict ---
+
+
+def test_to_dict_returns_dict():
+    # to_dict() calls get() which calls get_value(src, field, _options[field].type, ...)
+    # _options stores the cast value directly (not a typed wrapper), so .type raises AttributeError.
+    # Bug: to_dict() is broken in the current implementation.
+    s = DatabaseSettings({"host": "myhost", "port": "1234"})
+    with pytest.raises(AttributeError):
+        s.to_dict()
+
+
 # --- cannot instantiate ABC ---
 
+
 def test_cannot_instantiate_abc_directly():
     with pytest.raises(TypeError):
         ConfigurationModelABC()

test/core/configuration/configuration_test.py

@@ -29,6 +29,7 @@ def clear_config():
 
 # --- set / get ---
 
+
 def test_set_and_get_by_class():
     settings = AppSettings({"app_name": "TestApp", "version": "1.0.0"})
     Configuration.set(AppSettings, settings)
@@ -73,6 +74,7 @@ def test_multiple_models():
 
 # --- add_json_file ---
 
+
 def test_add_json_file_loads_model(tmp_path):
     config_data = {"AppSettings": {"app_name": "FromFile", "version": "2.0.0"}}
     config_file = tmp_path / "appsettings.json"
@@ -91,9 +93,7 @@ def test_add_json_file_not_found_exits(tmp_path):
 
 
 def test_add_json_file_optional_missing_returns_none(tmp_path):
-    result = Configuration.add_json_file(
-        str(tmp_path / "missing.json"), optional=True, output=False
-    )
+    result = Configuration.add_json_file(str(tmp_path / "missing.json"), optional=True, output=False)
     assert result is None