Keep a record of each run's tool calls so bots can't claim work they never did

The wrap-up turn now gets the run's actual tool calls, each bot message
keeps them as bot_messages.tool_log, and history follows recorded bot
messages with an [App record] line. The coordinator also gets update_bot
in workspaces, so it can fill a bot's core prompt from there.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/harness/types.ts

@@ -20,6 +20,15 @@ export type HarnessToolCall = {
     arguments: string;
 };
 
+/**
+ * One tool call a run made, and whether it went through (a result that
+ * isn't `Error: ...`). Names only, never arguments.
+ */
+export type HarnessToolUse = {
+    name: string;
+    ok: boolean;
+};
+
 export type HarnessMessage =
     | { role: "system"; content: string }
     | { role: "user"; content: string | HarnessContentPart[] }