fix/function-tool-strict-schema

fix/CI-run-format-check

feat/immediate-tool-call-item-streaming

docs/usage-tracking

feat/sqlalchemy-sessions

docs/sqlalchemy-session-improvements

fix/emtpy-arguments-in-tool_call_item-event

docs/improve-usage-tracking

bug/session-history-duplication

fix/null-values-in-strict-json-schema

bug/old-version-test-environment-sync

bug/anthropic-tool-cal-with-thinking

session-schema-improvements

fix/anthropic-extended-thinking-bug

feat/add-litellm-cost-to-usage

session-docs-improvements

feat/soft-cancel

bug/anthropic-tool-result-block-ordering

bug/track-usage-before-completion-event

feat/track-usage-for-individual-requests