Added a /conditions/current endpoint with computed best-guess values for current conditions

internal/adapters/postgres/scan.go

@@ -29,6 +29,14 @@ func ptrBool(v sql.NullBool) *bool {
 	return &b
 }
 
+func ptrInt(v sql.NullInt64) *int {
+	if !v.Valid {
+		return nil
+	}
+	i := int(v.Int64)
+	return &i
+}
+
 func ptrTime(v sql.NullTime) *time.Time {
 	if !v.Valid {
 		return nil