(new): PollTimeout config, RateLimiter.Cleanup

(fix): compact payload escape, Draft.push validation, plugin logger ownership, worker StopAndWait, getChatLimiter deadlock, runner ctx-after-tick
(refactor): remove NewPayload, buildSceneKey from sceneRuntime, unify ToJSON fallback
(tests): compact round-trip, Draft.push state, RateLimiter.Cleanup eviction
(doc): changelog v1.0.0 rewrite, NewCommand dual-use godoc

utils/limiter_test.go

@@ -39,3 +39,52 @@ func TestRateLimiterGlobalWaitRespectsContextCancellation(t *testing.T) {
 		t.Fatalf("expected DeadlineExceeded, got %v", err)
 	}
 }
+
+// TestRateLimiterCleanupEvictsIdleChats guards the memory-leak fix: per-chat
+// limiter and lastSeen state must be reclaimed by Cleanup once the entry has
+// been idle for longer than the threshold, while still-active chats and
+// unexpired cooldowns must survive.
+func TestRateLimiterCleanupEvictsIdleChats(t *testing.T) {
+	rl := NewRateLimiter()
+
+	// Touch chat 1 to make it tracked, then backdate its last-seen marker
+	// so it looks idle from Cleanup's perspective.
+	if !rl.Allow(1) {
+		t.Fatal("expected initial Allow for chat 1 to succeed")
+	}
+	rl.chatMu.Lock()
+	rl.chatLastSeen[1] = time.Now().Add(-time.Hour)
+	rl.chatMu.Unlock()
+
+	// Touch chat 2 so it stays "active".
+	if !rl.Allow(2) {
+		t.Fatal("expected initial Allow for chat 2 to succeed")
+	}
+
+	// Expired cooldown should be evicted; future cooldown should survive.
+	rl.SetChatLock(10, 1)
+	rl.chatMu.Lock()
+	rl.chatLocks[10] = time.Now().Add(-time.Second)
+	rl.chatLocks[11] = time.Now().Add(time.Hour)
+	rl.chatMu.Unlock()
+
+	rl.Cleanup(time.Minute)
+
+	rl.chatMu.RLock()
+	defer rl.chatMu.RUnlock()
+	if _, ok := rl.chatLimiters[1]; ok {
+		t.Fatal("expected idle chat 1 limiter to be evicted")
+	}
+	if _, ok := rl.chatLastSeen[1]; ok {
+		t.Fatal("expected idle chat 1 lastSeen to be evicted")
+	}
+	if _, ok := rl.chatLimiters[2]; !ok {
+		t.Fatal("expected active chat 2 limiter to remain")
+	}
+	if _, ok := rl.chatLocks[10]; ok {
+		t.Fatal("expected expired chat 10 lock to be evicted")
+	}
+	if _, ok := rl.chatLocks[11]; !ok {
+		t.Fatal("expected future chat 11 lock to remain")
+	}
+}