refactor(test): share overflow compaction mocks

src/agents/pi-embedded-runner/run.overflow-compaction.fixture.ts

@@ -0,0 +1,22 @@
+import type { EmbeddedRunAttemptResult } from "./run/types.js";
+
+export function makeAttemptResult(
+  overrides: Partial<EmbeddedRunAttemptResult> = {},
+): EmbeddedRunAttemptResult {
+  return {
+    aborted: false,
+    timedOut: false,
+    timedOutDuringCompaction: false,
+    promptError: null,
+    sessionIdUsed: "test-session",
+    assistantTexts: ["Hello!"],
+    toolMetas: [],
+    lastAssistant: undefined,
+    messagesSnapshot: [],
+    didSendViaMessagingTool: false,
+    messagingToolSentTexts: [],
+    messagingToolSentTargets: [],
+    cloudCodeAssistFormatError: false,
+    ...overrides,
+  };
+}