chore: bump version to 0.5.11 for Feature 051 release

Feature 051: Simplify IRIS Connection Architecture
- Single-call API with get_iris_connection()
- Automatic edition detection
- Module-level connection caching
- Optional connection pooling for high-concurrency
- Backward compatibility via deprecation warnings

Author: tom-dyar

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "iris-vector-rag"
-version = "0.5.10"
+version = "0.5.11"
 description = "Production-ready, extensible RAG framework with native IRIS vector search - unified API for basic, CRAG, GraphRAG, and ColBERT pipelines with RAGAS and DSPy integration"
 readme = "README.md"
 license = {text = "MIT"}