test: harden group load verification

loadtest/im-pressure/model.go

@@ -33,6 +33,8 @@ type Config struct {
 	PhonePrefix      string              `json:"registration_phone_prefix"`
 	VerifyCodeEnv    string              `json:"verification_code_env"`
 	HistoryWorkers   int                 `json:"history_workers"`
+	HistoryPageSize  int                 `json:"history_page_size"`
+	HistoryInterval  string              `json:"history_query_interval"`
 	HistorySettle    string              `json:"history_settle"`
 	HistoryTimeout   string              `json:"history_timeout"`
 	PreflightWorkers int                 `json:"preflight_workers"`
@@ -82,11 +84,23 @@ func loadConfig(path string) (*Config, error) {
 		cfg.DrainGroup = "60s"
 	}
 	if cfg.HistoryWorkers <= 0 {
-		cfg.HistoryWorkers = 12
+		cfg.HistoryWorkers = 1
 	}
 	if cfg.HistoryWorkers > 128 {
 		return nil, errors.New("history_workers must not exceed 128")
 	}
+	if cfg.HistoryPageSize <= 0 {
+		cfg.HistoryPageSize = 50
+	}
+	if cfg.HistoryPageSize > 200 {
+		return nil, errors.New("history_page_size must not exceed 200")
+	}
+	if cfg.HistoryInterval == "" {
+		cfg.HistoryInterval = "100ms"
+	}
+	if _, err = configDuration(cfg.HistoryInterval); err != nil {
+		return nil, fmt.Errorf("history_query_interval: %w", err)
+	}
 	if cfg.HistoryTimeout == "" {
 		cfg.HistoryTimeout = "3m"
 	}
@@ -368,6 +382,7 @@ type AgentSummary struct {
 	PublishAttempted      int64               `json:"publish_attempted"`
 	PublishAccepted       int64               `json:"publish_accepted"`
 	PublishRejected       int64               `json:"publish_rejected"`
+	PublishOutcomeUnknown int64               `json:"publish_outcome_unknown"`
 	PublishErrors         map[string]int64    `json:"publish_errors,omitempty"`
 	ExpectedPeer          int64               `json:"expected_peer"`
 	ReceivedPeer          int64               `json:"received_peer"`
@@ -384,6 +399,8 @@ type AgentSummary struct {
 	UnexpectedMessages    int64               `json:"unexpected_messages"`
 	HistoryChecked        int64               `json:"history_checked"`
 	HistoryFound          int64               `json:"history_found"`
+	HistoryUnackedChecked int64               `json:"history_unacked_observed_checked"`
+	HistoryUnackedFound   int64               `json:"history_unacked_observed_found"`
 	PersistenceLost       int64               `json:"persistence_lost"`
 	AckLatency            HistogramSnapshot   `json:"ack_latency"`
 	DeliveryLatency       HistogramSnapshot   `json:"delivery_latency"`