Release v1.3.1: Add get_current_directory to Essential Tools

What's Changed

Essential Tools Enhancement

• Added get_current_directory from the system module to load_essential(), giving general-purpose agents the ability to check the current working directory out of the box

Dependency Updates

• Updated 25+ packages including anthropic (0.79→0.84), fastapi (0.129→0.135), strands-agents (1.26→1.29), ruff (0.15.1→0.15.5), setuptools (63→82), and more
• Resolved all dependency conflicts (opentelemetry, pydantic, pdfminer pinning)

Test Results

• 1290 tests passing, no regressions from dependency updates
• 3 pre-existing failures (Python 3.10 inspect.signature() limitation with builtins)