The batch cleanup leftover warning used a class defined in a test-directory module. The xdist controller cannot import it, so an uncaught leftover warning crashed the whole e2e run. It is now a plain UserWarning.
The integration harness backport missed the workers option and Gateway.request headers that the OTel conversation id tests use.
Adds the OwnedProxy harness the #42486 backport's OTel test imports, registers the #43029 backport's spend flush test in contracts.json with its covers marker, and aligns the MCP tool failure assertion with main.
Adds owned local TCP peers, a Redis process helper and SigV4 helpers to
tests/integration, and integration contracts for Anthropic and Bedrock wire
shapes, Bedrock role configuration, S3 wire, observed routing, Redis
recovery and stream contracts. Consolidates the four commits previously
stacked on litellm_integration_accounting onto its main-merged tip
