Summary

• Adds .child() method to the sync logger for creating contextual child loggers
• Child loggers inherit parent annotations and can add their own, enabling hierarchical annotation composition
• Exports the SyncLogger type for public API usage
• Comprehensive test coverage for annotation merging, overrides, and chaining behavior

Test plan

• Logs without annotations
• Initial annotations from sync()
• .child() adds annotations
• .child() merges parent + child annotations
• .child() overrides parent on key conflict
• Chained .child().child() accumulates annotations
• Parent unaffected by child creation
• All log levels work on child
• Per-call attributes merge with persistent annotations