Component SDK 0.1.1: preserve uncertain write outcomes

Retain outcomeUnknown for MCP tool/domain failures and internal JSON-RPC errors, because an external effect can precede the failure. Request-validation errors remain distinguishable.

Regression: the new after-dispatch failure case failed before the fix, then all eight wire tests and negative type controls passed. Node 22/24 CI at the release commit is green. No automatic retries are introduced.