harden article generation reliability

server/internal/shared/config/config_test.go

@@ -480,6 +480,18 @@ generation:
 	if cfg.Generation.TaskMaxAttempts != 3 {
 		t.Fatalf("expected default task max attempts 3, got %d", cfg.Generation.TaskMaxAttempts)
 	}
+	if cfg.Generation.TaskStateCheckInterval != 5*time.Minute {
+		t.Fatalf("expected default task state check interval 5m, got %s", cfg.Generation.TaskStateCheckInterval)
+	}
+	if cfg.Generation.TaskStateCheckTimeout != 10*time.Second {
+		t.Fatalf("expected default task state check timeout 10s, got %s", cfg.Generation.TaskStateCheckTimeout)
+	}
+	if cfg.Generation.TaskStateCheckBatchSize != 100 {
+		t.Fatalf("expected default task state check batch size 100, got %d", cfg.Generation.TaskStateCheckBatchSize)
+	}
+	if cfg.Generation.TaskStateCheckLookback != 24*time.Hour {
+		t.Fatalf("expected default task state check lookback 24h, got %s", cfg.Generation.TaskStateCheckLookback)
+	}
 }
 
 func TestLoadAppliesGenerationRecoveryOverrides(t *testing.T) {
@@ -494,6 +506,10 @@ generation:
   task_recovery_batch_size: 12
   task_queued_stale_after: 45s
   task_max_attempts: 5
+  task_state_check_interval: 9m
+  task_state_check_timeout: 11s
+  task_state_check_batch_size: 13
+  task_state_check_lookback: 2h
 `)
 
 	cfg, err := Load(configPath)
@@ -509,11 +525,38 @@ generation:
 		cfg.Generation.TaskRecoveryTimeout != 10*time.Second ||
 		cfg.Generation.TaskRecoveryBatchSize != 12 ||
 		cfg.Generation.TaskQueuedStaleAfter != 45*time.Second ||
-		cfg.Generation.TaskMaxAttempts != 5 {
+		cfg.Generation.TaskMaxAttempts != 5 ||
+		cfg.Generation.TaskStateCheckInterval != 9*time.Minute ||
+		cfg.Generation.TaskStateCheckTimeout != 11*time.Second ||
+		cfg.Generation.TaskStateCheckBatchSize != 13 ||
+		cfg.Generation.TaskStateCheckLookback != 2*time.Hour {
 		t.Fatalf("unexpected generation recovery config: %#v", cfg.Generation)
 	}
 }
 
+func TestLoadAppliesGenerationStateCheckEnvOverrides(t *testing.T) {
+	t.Setenv("GENERATION_TASK_STATE_CHECK_INTERVAL", "3m")
+	t.Setenv("GENERATION_TASK_STATE_CHECK_TIMEOUT", "4s")
+	t.Setenv("GENERATION_TASK_STATE_CHECK_BATCH_SIZE", "17")
+	t.Setenv("GENERATION_TASK_STATE_CHECK_LOOKBACK", "6h")
+
+	configPath := writeTestConfig(t, `
+generation: {}
+`)
+
+	cfg, err := Load(configPath)
+	if err != nil {
+		t.Fatalf("Load() error = %v", err)
+	}
+
+	if cfg.Generation.TaskStateCheckInterval != 3*time.Minute ||
+		cfg.Generation.TaskStateCheckTimeout != 4*time.Second ||
+		cfg.Generation.TaskStateCheckBatchSize != 17 ||
+		cfg.Generation.TaskStateCheckLookback != 6*time.Hour {
+		t.Fatalf("unexpected generation state check env config: %#v", cfg.Generation)
+	}
+}
+
 func TestStoreReloadsConfigAndKeepsPreviousOnInvalidYAML(t *testing.T) {
 	configPath := writeTestConfig(t, `
 jwt: