Parent Issue

Implements Phase 3.1 of #296

Tasks

• Design structured log entry interface
• Define standard fields (timestamp, level, message, source, etc.)
• Design context propagation mechanism
• Plan backward compatibility with string logging

Deliverables

• Interface design for LogEntry class
• Standard field definitions
• Context scope management design
• API compatibility documentation

Acceptance Criteria

• Clear interface definition
• Standard fields documented
• Context propagation design complete
• Backward compatibility plan approved