`droid exec --output-format stream-json` is missing a matching id in tool_result messages

[britannio]

Previously, tool calls and tool call results would contain a matching id field to correlate tool call results with tool calls.

Here's an example trace taken a few days ago.
https://github.com/BloopAI/vibe-kanban/blob/fa7245c632ac774ec71a98e26094e0fb6d70cf14/crates/executors/tests/droid_snapshots/fixtures/edits-and-execution.jsonl#L3-L4

In v0.22.2, this id field is omitted from the tool result messages. Since tools can be called in parallel and thus tool result ordering isn't stable, it's harder to reliably match tool call results with their tool calls without this field.

Example:

{"type":"tool_call","id":"call_2yjwwOa7wMTvPUAo58lgUU2z","messageId":"3a213d62-8f07-48dd-8ec8-abeb68ade47c","toolId":"Execute","toolName":"Execute","parameters":{"command":"cargo new calculator --bin","timeout":90,"riskLevel":{"value":"medium","reason":"Creates new files and directories in the workspace using Cargo."}},"timestamp":1761339150464,"session_id":"2c4cca33-6fcb-4b4c-b9f2-793ad5174978"}
{"type":"tool_result","messageId":"3358106a-e957-4df9-9ae2-79bc4bf4c5ea","toolId":"","isError":false,"value":"    Creating binary (application) `calculator` package\nnote: see more `Cargo.toml` keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html\n\n\n[Process exited with code 0]","timestamp":1761339150590,"session_id":"2c4cca33-6fcb-4b4c-b9f2-793ad5174978"}