Function safeSerialize

Safely serializes a value for structured logging, handling:

• Circular references → "[Circular]"
• Depth limits → "[Object]" or "[Array]"
• BigInt → string representation
• Buffer → "[Buffer(N bytes)]"
• Functions → "[Function: name]"
• Symbols → "[Symbol: description]"
• Error objects → { message, stack, name, ...ownProperties }
• Long strings → truncated with "...(truncated)"