fix: イテレーション入力待ち中のpoll_tickログ連続出力を抑制

入力待ちフラグ(enterInputWait/leaveInputWait)を導入し、
selectOption待ち中はワーカープールのポーリングログをスキップする。
入力完了で自動復活。

src/features/tasks/execute/inputWait.ts

@@ -0,0 +1,24 @@
+/**
+ * Shared input-wait state for worker pool log suppression.
+ *
+ * When a task is waiting for user input (e.g. iteration limit prompt),
+ * the worker pool should suppress poll_tick debug logs to avoid
+ * flooding the log file with identical entries.
+ */
+
+let waitCount = 0;
+
+/** Call when entering an input-wait state (e.g. selectOption). */
+export function enterInputWait(): void {
+  waitCount++;
+}
+
+/** Call when leaving an input-wait state. */
+export function leaveInputWait(): void {
+  if (waitCount > 0) waitCount--;
+}
+
+/** Returns true if any task is currently waiting for user input. */
+export function isInputWaiting(): boolean {
+  return waitCount > 0;
+}

src/features/tasks/execute/parallelExecution.ts

@@ -18,6 +18,7 @@ import { EXIT_SIGINT } from '../../../shared/exitCodes.js';
 import { createLogger } from '../../../shared/utils/index.js';
 import { executeAndCompleteTask } from './taskExecution.js';
 import { ShutdownManager } from './shutdownManager.js';
+import { isInputWaiting } from './inputWait.js';
 import type { TaskExecutionOptions } from './types.js';
 
 const log = createLogger('worker-pool');
@@ -169,7 +170,7 @@ export async function runWithWorkerPool(
         }
       }
 
-      if (!abortController.signal.aborted) {
+      if (!abortController.signal.aborted && !isInputWaiting()) {
         const freeSlots = concurrency - active.size;
         if (freeSlots > 0) {
           const newTasks = taskRunner.claimNextTasks(freeSlots);

src/features/tasks/execute/pieceExecution.ts

@@ -10,6 +10,7 @@ import type { PieceExecutionResult, PieceExecutionOptions } from './types.js';
 import { detectRuleIndex } from '../../../shared/utils/ruleIndex.js';
 import { interruptAllQueries } from '../../../infra/claude/query-manager.js';
 import { callAiJudge } from '../../../agents/ai-judge.js';
+import { enterInputWait, leaveInputWait } from './inputWait.js';
 
 export type { PieceExecutionResult, PieceExecutionOptions };
 
@@ -398,6 +399,8 @@ export async function executePiece(
       playWarningSound();
     }
 
+    enterInputWait();
+    try {
       const action = await selectOption(getLabel('piece.iterationLimit.continueQuestion'), [
         {
           label: getLabel('piece.iterationLimit.continueLabel'),
@@ -425,6 +428,9 @@ export async function executePiece(
 
         out.warn(getLabel('piece.iterationLimit.invalidInput'));
       }
+    } finally {
+      leaveInputWait();
+    }
   };
 
   const onUserInput = interactiveUserInput