Method log

src/logger.ts:901–909

(level: LogLevel, source: LogSource, phase: LogPhase, message: string, details?: unknown)

    }
    
    private log(level: LogLevel, source: LogSource, phase: LogPhase, message: string, details?: unknown): void {
        addEntry({
            id: `log_${++logCounter}`,
            requestId: this.requestId,
            timestamp: Date.now(),
            level, source, phase, message, details,
            duration: Date.now() - this.summary.startTime,
        });
    }
    
    // ---- 阶段追踪 ----
    startPhase(phase: LogPhase, label: string): void {