Add python-cqrs to new CQRS & Event Sourcing section 🦄

[vadikko2]

🦄 Hidden Gem Submission (<100 stars)

python-cqrs — Event-Driven Architecture Framework for building event-driven microservices with CQRS pattern:

Key Differentiators:

• Transaction Outbox — guaranteed event delivery (at-least-once semantics)
• Saga Orchestration — distributed transactions with automatic compensation
• Seamless FastAPI/FastStream integration — production-ready out-of-box
• Any request/response types — easy integration with your models (Pydantic, dataclasses, etc.)
• 1+ years stable development (Jul 30, 2024 → Jan 31, 2026)

Production Value:

Build event-driven microservices with CQRS in minutes, not weeks. Perfect companion for Event Sourcing architectures.

Quality Metrics:

• ⭐ 34+ stars, growing steadily
• ✅ 100% Python codebase
• ✅ Full MkDocs docs: https://mkdocs.python-cqrs.dev/
• ✅ v5.x releases, production examples (FastAPI/FastStream)

Why Exceptional:

Most Python "CQRS" libs = basic MediatR clones. python-cqrs = complete event-driven framework: Outbox pattern, Saga coordination, seamless FastAPI/FastStream integration for production microservices.

[JinyangWang27]

@vadikko2 Thank you for submission. This is indeed a valuable project. However, given that there is already an Algorithm and Design Pattern section, could you please move this project to that section? It will be ready to merge then.