Add a new narrative forecast module and remove the unimplemented daily forecast stub

internal/briefing/modules.go

@@ -152,6 +152,8 @@ func collectedFactAvailable(requirement module.FactRequirement, ctx ModuleContex
 	switch requirement {
 	case module.CollectedCurrentConditions:
 		return ctx.Collected.Current != nil
+	case module.CollectedNarrativeForecast:
+		return ctx.Collected.Narrative != nil
 	case module.CollectedAlerts:
 		return ctx.Collected.Alerts != nil
 	case module.CollectedDiscussion:
@@ -262,6 +264,16 @@ func defaultModuleDefinitions() []ModuleDefinition {
 			MissingData:       module.MissingDataOmit,
 			Builder:           buildCurrentConditionsModule,
 		},
+		{
+			ID:                module.NarrativeForecast,
+			StanzaName:        "narrative_forecast",
+			DefaultOptions:    module.NarrativeForecastOptions{},
+			RequiredCollected: []module.FactRequirement{module.CollectedNarrativeForecast},
+			RequiredDerived:   []module.FactRequirement{module.RequiresDerivedNarrativePeriods},
+			SupportedReports:  []report.ID{report.DailyToday, report.DailyTomorrow},
+			MissingData:       module.MissingDataOmit,
+			Builder:           buildNarrativeForecastModule,
+		},
 		{
 			ID:               module.DerivedDailySummary,
 			StanzaName:       "derived_daily_summary",