Claude agent: complete each tool call when its tool_result arrives, not in bulk at end of turn

Problem

With the 0.1.x adapter (@rivet-dev/agent-os-claude), SDK user messages carrying tool_result blocks were ignored; active tool calls were only completed in bulk at the end of the turn. For a client rendering tool-call cards this looks wrong for both sequential and parallel tool use: a tool that finished in 1s stays "running" for the whole turn (which can be minutes), users cannot tell which tool is actually in flight, and every call then flips running → completed at the same instant.

Request

• Each tool call should transition to completed/failed as soon as its tool_result arrives (is_error mapped to failed), with end-of-turn bulk completion kept only as a fallback for leftovers.
• Please confirm the packaged Claude agent on current main behaves this way; if it still completes in bulk, please fix it.
• A regression test with two tool calls finishing at different times would lock the behavior in.

Inspect the 0.1.x @rivet-dev/agent-os-claude adapter and its handling of SDK user messages containing tool_result blocks. Reproduce sequential and parallel tool calls with different completion times, then verify each result transitions its call to completed or failed immediately while end-of-turn completion handles only leftovers.