Make episode file output with anon_chi

I've added this as a parameter so you can output CHI if desired, but the default is for anon_chi.

For the tests, it swaps back to CHI as there are some tests which specifically us the CHI number.

R/process_tests_episode_file.R

@@ -10,7 +10,7 @@ process_tests_episode_file <- function(data, year) {
   data <- data %>%
     dplyr::select(
       "year",
-      "chi",
+      "anon_chi",
       "gender",
       "postcode",
       "hbtreatcode",
@@ -20,7 +20,8 @@ process_tests_episode_file <- function(data, year) {
       "record_keydate1",
       "record_keydate2",
       dplyr::contains(c("beddays", "cost", "cij"))
-    )
+    ) %>%
+    slfhelper::get_chi()
 
   old_data <- get_existing_data_for_tests(data)
 

R/run_episode_file.R

@@ -4,11 +4,17 @@
 #' @param year The year to process, in FY format.
 #' @param write_to_disk (optional) Should the data be written to disk default is
 #' `TRUE` i.e. write the data to disk.
+#' @param anon_chi_out (Default:TRUE) Should `anon_chi` be used in the output
+#' (instead of chi)
 #'
 #' @return a [tibble][tibble::tibble-package] containing the episode file
 #' @export
 #'
-run_episode_file <- function(processed_data_list, year, write_to_disk = TRUE) {
+run_episode_file <- function(
+    processed_data_list,
+    year,
+    write_to_disk = TRUE,
+    anon_chi_out = TRUE) {
   episode_file <- dplyr::bind_rows(processed_data_list) %>%
     create_cost_inc_dna() %>%
     apply_cost_uplift() %>%
@@ -103,6 +109,14 @@ run_episode_file <- function(processed_data_list, year, write_to_disk = TRUE) {
     join_deaths_data(year) %>%
     load_ep_file_vars(year)
 
+  if (anon_chi_out) {
+    episode_file <- slfhelper::get_anon_chi(
+      episode_file,
+      chi_var = "chi",
+      drop = TRUE
+    )
+  }
+
   if (write_to_disk) {
     slf_path <- get_file_path(
       get_year_dir(year),