feat: produce on planets, unload on routes

internal/controller/controller_export_test.go

@@ -82,3 +82,7 @@ func (c *Cache) CollectBombingGroups() map[uint]map[int][]int {
 func BombPlanet(p *game.Planet, power float64) {
 	bombPlanet(p, power)
 }
+
+func (c *Cache) ListProducingPlanets() iter.Seq[uint] {
+	return c.listProducingPlanets()
+}