Add blog post: MongoDB Transactions and ACID Compliance - Advanced Multi-Document Operations

Comprehensive tutorial on MongoDB's multi-document ACID transactions covering:
- Traditional NoSQL transaction challenges and limitations
- MongoDB's sophisticated transaction management system
- Complex business logic implementation with full ACID compliance
- Advanced error handling, retry patterns, and deadlock detection
- Production-ready transaction patterns with comprehensive monitoring
- SQL-style transaction management through QueryLeaf integration
- Real-time fraud detection and inventory allocation within transactions
- Comprehensive audit trails and regulatory compliance patterns

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Co-Authored-By: Claude <noreply@anthropic.com>

Author: rathboma