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>
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