Long expeditions D5-c: wire Ranger forage SU

§4.2's "Ranger, 1d4 SU/day" perk had been dead since Phase 12 E1b —
SupplyForageMaxSU was defined but unreferenced, ForagedToday was only
ever reset to false. New applyRangerForage helper grants 1d4 SU once
per day (headroom-capped, Ranger-only), fires at the top of
nightRolloverBurn, and surfaces as a "forage" line in the end-of-day
digest. No DC roll — accessibility over crunch, and the D5-a caps
already give all loadouts comfortable headroom.

internal/plugin/expedition_autorun_digest.go

@@ -40,6 +40,7 @@ func renderEndOfDayDigest(expID string, prevDay int) string {
 		walks         int
 		harvests      int
 		interrupts    int
+		forageLines   []string
 		threatLines   []string
 		milestoneLine []string
 		narrativeBits []string
@@ -53,6 +54,8 @@ func renderEndOfDayDigest(expID string, prevDay int) string {
 			if strings.Contains(e.Summary, "success") {
 				harvests++
 			}
+		case "forage":
+			forageLines = append(forageLines, e.Summary)
 		case "interrupt":
 			interrupts++
 		case "threat":
@@ -88,6 +91,12 @@ func renderEndOfDayDigest(expID string, prevDay int) string {
 		b.WriteString(fmt.Sprintf("• Came back with **%d** harvest%s.\n", harvests, pluralS(harvests)))
 		bulleted = true
 	}
+	for _, f := range forageLines {
+		b.WriteString("• ")
+		b.WriteString(f)
+		b.WriteString("\n")
+		bulleted = true
+	}
 	for _, t := range threatLines {
 		b.WriteString("• ")
 		b.WriteString(t)