Bring script headers onto the template and close safeguard gaps

Headers claimed protections the code never had, and several destructive paths had no
guard against a collapsed config value.

Docker_Essentials/docker_network_connect.sh

@@ -51,6 +51,12 @@
 # OPERATIONAL SAFEGUARDS
 # ==============================================================================================
 #
+# Root Enforcement
+#   Docker network operations require root privileges.
+#
+# Docker Presence Check
+#   Verifies the docker binary exists before any network operations.
+#
 # Lock Acquisition
 #   Prevents concurrent execution via acquire_lock(). Safe to call from
 #   array start hooks or manually without risk of overlap.
@@ -71,8 +77,10 @@
 #   Warns and exits cleanly if NETWORK_CONNECT_NETWORKS or
 #   NETWORK_CONNECT_CONTAINERS are unconfigured.
 #
-# Command Validation
-#   Validates unRAID notify script before use.
+# Missing Container Tolerance
+#   A configured container that does not exist yet warns and is skipped rather
+#   than failing the run. This script executes early at array start, before
+#   every container has necessarily been created.
 #
 # ==============================================================================================
 # CONFIGURATION
@@ -130,13 +138,12 @@ fi
 # detect_hosts() sets MY_ID and aliases HOST*_NETWORK_CONNECT_* arrays
 detect_hosts
 
-# Validate unRAID notify script — used for network creation alerts
-
 # Docker daemon check — network operations are useless if daemon is hung
 DOCKER_TIMEOUT=15
 if ! timeout "$DOCKER_TIMEOUT" docker info >/dev/null 2>&1; then
     error "Docker daemon not responding — cannot manage networks"
-    notify "docker_network_connect failed on $(hostname) — Docker daemon not responding"         "Network Connect" "warning"
+    notify "docker_network_connect failed on $(hostname) — Docker daemon not responding" \
+        "Network Connect" "warning"
     exit 1
 fi
 
@@ -291,7 +298,8 @@ if [[ "$DRY_RUN" == true ]]; then
     warn "DRY RUN — no changes made"
 elif [[ ${#FAILED[@]} -gt 0 ]]; then
     echo "$ICON_ERROR Status: SOME OPERATIONS FAILED"
-    notify "Docker network connect failed on $(hostname) — ${FAILED[*]}"         "Network Connect" "warning"
+    notify "Docker network connect failed on $(hostname) — ${FAILED[*]}" \
+        "Network Connect" "warning"
 elif [[ ${#NETWORKS_CREATED[@]} -gt 0 ]]; then
     warn "Networks recreated — ${NETWORKS_CREATED[*]} — unRAID update likely wiped them"
 else