Prune stale chronic failure counts once an item stops being a problem

FAILURE_COUNTS persisted across runs but was never reset on success —
confirmed live 2026-07-19 that Sekirei S06E04 sat permanently flagged
chronic at count 4 despite already having hasFile=true. "Consecutive
failures" was really being measured as cumulative-for-all-time. Now
prunes any media_id's count at the end of each arr's pass if it no
longer appears in that run's problem-item set, so a resolved item's
history doesn't linger and falsely trip the circuit breaker later.

Arrs_Stack/arrs_failed_stalled_recovery.sh

@@ -74,6 +74,12 @@
 #   but search is no longer auto-triggered — it's flagged chronic and left for
 #   manual review instead.
 #
+#   "Consecutive" is enforced, not just counted — a media_id's failure count
+#   is pruned at the end of every process_arr() pass if it no longer appears
+#   in that run's problem-item set (2026-07-19 fix: counts were never reset on
+#   success, so an item that failed a few times months apart and then imported
+#   fine could still get stuck permanently chronic from stale history).
+#
 # ==============================================================================================
 # OPERATIONAL SAFEGUARDS
 # ==============================================================================================
@@ -486,6 +492,9 @@ process_arr() {
 
     local actioned=0 skipped_new=0 chronic=0 smart_imported=0
     local is_chronic fail_key fail_count
+    local -A seen_media_ids   # media_ids appearing as a problem this run — anything NOT in
+                              # here by the end has stopped being a problem and has its
+                              # FAILURE_COUNTS entry pruned below
 
     echo ""
     echo "━━━ $ICON_SYNC $arr_name ━━━"
@@ -593,6 +602,8 @@ process_arr() {
             lidarr) media_id=$(echo "$item" | jq -r '.albumId // .album.id // empty' 2>/dev/null) ;;
         esac
 
+        [[ -n "$media_id" ]] && seen_media_ids["$media_id"]=1
+
         [[ -z "$queue_id" ]] && continue
 
         # Age check — skip items that are too new to have self-resolved
@@ -668,6 +679,21 @@ process_arr() {
 
     done <<< "$problem_items"
 
+    # Prune stale failure counts — anything for this arr_type that isn't a problem in this
+    # run's queue snapshot has either imported successfully or is otherwise no longer stuck.
+    # FAILURE_COUNTS never decremented on success (confirmed live 2026-07-19: Sekirei S06E04
+    # sat chronic at count 4 despite hasFile=true, already fully resolved) — "consecutive
+    # failures" is supposed to mean consecutive since it last wasn't a problem, not a
+    # cumulative count for all time. Age-skipped items are still in seen_media_ids (added
+    # before the age check above), so a too-new item correctly keeps its count instead of
+    # being reset just for not having been acted on yet.
+    local _fc_key _fc_id
+    for _fc_key in "${!FAILURE_COUNTS[@]}"; do
+        [[ "$_fc_key" == "${arr_type}:"* ]] || continue
+        _fc_id="${_fc_key#${arr_type}:}"
+        [[ -z "${seen_media_ids[$_fc_id]:-}" ]] && unset "FAILURE_COUNTS[$_fc_key]"
+    done
+
     if [[ "$actioned" -gt 0 ]]; then
         warn "$arr_name — actioned: $actioned (smart-imported: $smart_imported) | skipped (too new): $skipped_new | chronic: $chronic"
     else