feat(tests): add tests for unicode content, special characters, and concurrent access in SQLiteSession#1399

seratch merged 3 commits intoopenai:mainopenai/openai-agents-python:mainfrom

PatrykBochenek:sqlite-session-validation-and-robust-testsPatrykBochenek/openai-agents-python:sqlite-session-validation-and-robust-testsCopy head branch name to clipboard