fix: apply ruff formatting to openai converter files

[tejaskash]

Summary

• Applies ruff format to 2 files introduced in feat(strands-memory): add converter injection and optional restored-tool filtering #288 that were not formatted
• Fixes lint failures blocking all open dependabot PRs (chore(deps): bump cryptography from 45.0.5 to 46.0.5 #306, chore(deps): bump starlette from 0.47.1 to 0.49.1 #307, chore(deps): bump werkzeug from 3.1.5 to 3.1.6 #308, chore(deps): bump pillow from 11.3.0 to 12.1.1 #309, chore(deps): bump mcp from 1.12.2 to 1.23.0 #310, chore(deps-dev): bump wheel from 0.45.1 to 0.46.2 #221, ci(deps): bump actions/upload-artifact from 4 to 5 #140, ci(deps): bump actions/download-artifact from 5 to 6 #139)

Files changed

• src/bedrock_agentcore/memory/integrations/strands/converters/openai.py
• tests/bedrock_agentcore/memory/integrations/strands/test_agentcore_memory_session_manager_openai_converter.py

Test plan

• ruff format --check . passes after this change