chore: bump version to 3.1.0 for redundant PLC support release

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: QuakeString

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "snap7-optimized"
-version = "3.0.0"
+version = "3.1.0"
 description = "Pure Python S7 communication library for Siemens PLCs with read optimization pipeline"
 readme = "README.rst"
 authors = [