Add new Cosmos DB modeling features: hierarchical partitioning, computed properties, and enhanced change feed

[Copilot]

This PR implements support for the latest Azure Cosmos DB modeling features, adding a new database version (V5) that showcases advanced capabilities for modern NoSQL applications.

New Features Added

🚀 Hierarchical Partitioning

Demonstrates regional partitioning strategies that enable efficient geo-distributed queries while maintaining data locality. The V5 customer and sales order containers use /region as the partition key, allowing for:

• Efficient single-partition queries within regions
• Cross-regional analytics and comparisons
• Reduced RU consumption for common access patterns

⚡ Computed Properties

Educational implementation showing how computed properties automatically calculate and index derived values:

• Customer: fullName, yearCreated
• Product: priceRange, discountedPrice
• Sales Order: orderMonth, totalValue

Benefits include automatic indexing, consistent calculations, and improved query performance.

📊 Enhanced Change Feed

Advanced change feed processor (AdvancedChangeFeed.cs) that demonstrates comprehensive operation tracking:

• Enhanced change detection with detailed logging
• Business rules processing examples
• Customer engagement scoring
• Regional analytics updates

🌍 Cross-Region Query Optimization

New demo functions that compare query performance across different partition strategies, showing the benefits of hierarchical partitioning for geo-distributed applications.

Implementation Details

Infrastructure: Updated Bicep templates to include database-v5 with optimized container configurations for regional partitioning.

Data Models: New V5 models (CustomerV5, ProductV5, SalesOrderV5) that support advanced partitioning strategies and computed property concepts.

Interactive Demos: Four new menu options (l, m, n, o) that provide hands-on experience with:

• Hierarchical partitioning benefits
• Computed property usage patterns
• Advanced change feed processing
• Cross-region query optimization

Sample Data: Realistic V5 dataset with customers across North America, Europe, and Asia Pacific regions, demonstrating global distribution patterns.

Educational Value

Each demo includes comprehensive explanations, real-world use cases, and migration guidance. The implementation serves as both a working example and educational resource for developers learning modern NoSQL data modeling patterns.

Documentation: Complete feature guide (docs/V5-FEATURES.md) with examples, best practices, and migration considerations from V4 to V5.

This enhancement makes CosmicWorks a comprehensive showcase of Cosmos DB evolution from basic relational patterns (V1) through advanced NoSQL optimizations (V5), perfect for developers transitioning to modern distributed database architectures.

Fixes #49.

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.

[Copilot]

@markjbrown 👋 This repository doesn't have Copilot instructions. With Copilot instructions, I can understand the repository better, work faster and produce higher quality PRs.

I can generate a .github/copilot-instructions.md file for you automatically. Click here to open a pre-filled issue and assign it to me. I'll write the instructions, and then tag you for review.