Standardize orchestrator child-script execution and logging

Every orchestrator invoked its children differently — four near-duplicate
run_job() copies, a differently-shaped run_watchdog(), or plain inline bash
calls, each with its own take on path resolution, pass/fail naming, and
dry-run threading. Extracted one shared run_orch_child() into common.sh so
there's a single place to fix or extend this behavior going forward.

Along the way: watchdog_orchestrator.sh and monthly_maintenance.sh were
checking $VERBOSE, a variable nothing in the codebase ever assigns, so --log
silently did nothing beyond basic logging on those two. Fixed to
$ENABLE_LOGGING. watchdog_orchestrator.sh and array_started.sh had no
trailing exit, so their exit codes reflected whatever the last command
happened to return rather than actual success/failure. transcode_management.sh
had no failure notification and no summary at all. Also made
transcode_management.sh's two-script pipeline config-driven
(TRANSCODE_MANAGEMENT_SCRIPTS in master.conf) instead of hardcoded, for room
to extend it later without editing the orchestrator itself.

Orchestrators/array_started.sh

@@ -163,9 +163,8 @@ log "Launching ${#ARRAY_START_SCRIPTS[@]} script(s)..."
 echo ""
 
 START=$(date +%s)
-LAUNCHED=0
-FAILED=0
-FAILED_SCRIPTS=()
+JOB_PASS=()
+JOB_FAIL=()
 
 for relative_path in "${ARRAY_START_SCRIPTS[@]}"; do
     [[ -z "$relative_path" ]] && continue
@@ -177,8 +176,7 @@ for relative_path in "${ARRAY_START_SCRIPTS[@]}"; do
     if [[ ! -f "$SCRIPT_PATH" ]]; then
         error "$SCRIPT_NAME — not found"
         error "  Expected: $SCRIPT_PATH"
-        (( FAILED++ ))
-        FAILED_SCRIPTS+=("$SCRIPT_NAME")
+        JOB_FAIL+=("$SCRIPT_NAME")
         continue
     fi
 
@@ -187,15 +185,14 @@ for relative_path in "${ARRAY_START_SCRIPTS[@]}"; do
         warn "$SCRIPT_NAME — not executable, fixing..."
         chmod +x "$SCRIPT_PATH" || {
             error "$SCRIPT_NAME — chmod +x failed"
-            (( FAILED++ ))
-            FAILED_SCRIPTS+=("$SCRIPT_NAME")
+            JOB_FAIL+=("$SCRIPT_NAME")
             continue
         }
     fi
 
     if [[ "$DRY_RUN" == true ]]; then
         warn "DRY RUN — would launch: $SCRIPT_NAME"
-        (( LAUNCHED++ ))
+        JOB_PASS+=("$SCRIPT_NAME")
         continue
     fi
 
@@ -209,19 +206,18 @@ for relative_path in "${ARRAY_START_SCRIPTS[@]}"; do
     if kill -0 "$PID" 2>/dev/null; then
         # Still running → continuous script
         log "$SCRIPT_NAME — running (PID $PID) ✅"
-        (( LAUNCHED++ ))
+        JOB_PASS+=("$SCRIPT_NAME")
     else
         # Exited — check if one-shot success or failure
         wait "$PID"
         EXIT_CODE=$?
         if [[ "$EXIT_CODE" -eq 0 ]]; then
             echo "$SCRIPT_NAME — completed (one-shot) ✅"
-            (( LAUNCHED++ ))
+            JOB_PASS+=("$SCRIPT_NAME")
         else
             error "$SCRIPT_NAME — exited with code $EXIT_CODE"
             error "  Path: $SCRIPT_PATH"
-            (( FAILED++ ))
-            FAILED_SCRIPTS+=("$SCRIPT_NAME")
+            JOB_FAIL+=("$SCRIPT_NAME")
         fi
     fi
 
@@ -235,18 +231,21 @@ END=$(date +%s)
 echo ""
 echo "━━━━━ $ICON_SUMMARY ARRAY START SUMMARY ━━━━━"
 echo "$ICON_HOST    Identity: $MY_ID ($LOCAL_SERVER_NAME)"
-echo "$ICON_SUCCESS Launched: $LAUNCHED"
-[[ "$FAILED" -gt 0 ]] && echo "$ICON_ERROR  Failed:   $FAILED — ${FAILED_SCRIPTS[*]}"
+echo "$ICON_SUCCESS Launched: ${#JOB_PASS[@]}"
+[[ ${#JOB_FAIL[@]} -gt 0 ]] && echo "$ICON_ERROR  Failed:   ${#JOB_FAIL[@]} — ${JOB_FAIL[*]}"
 echo "$ICON_TIME    Duration: $(format_duration $(( END - START )))"
 echo ""
 
 if [[ "$DRY_RUN" == true ]]; then
     warn "DRY RUN — no scripts launched"
-elif [[ "$FAILED" -gt 0 ]]; then
-    warn "Status: $FAILED script(s) failed — ${FAILED_SCRIPTS[*]}"
-    notify "Array start on $(hostname) ($MY_ID) — $FAILED script(s) failed: ${FAILED_SCRIPTS[*]}" \
+elif [[ ${#JOB_FAIL[@]} -gt 0 ]]; then
+    warn "Status: ${#JOB_FAIL[@]} script(s) failed — ${JOB_FAIL[*]}"
+    notify "Array start on $(hostname) ($MY_ID) — ${#JOB_FAIL[@]} script(s) failed: ${JOB_FAIL[*]}" \
         "Array Start" "warning"
 else
-    echo "$ICON_DONE Status: all $LAUNCHED script(s) launched ✅"
+    echo "$ICON_DONE Status: all ${#JOB_PASS[@]} script(s) launched ✅"
 fi
-echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+
+[[ ${#JOB_FAIL[@]} -gt 0 ]] && exit 1
+exit 0