unraid_api_key_renew: always sync registry key to conf

Previously exited early when key was found in registry without checking
if the conf matched. After a reboot or key rotation the registry holds
the current key but the conf could have a stale value causing API auth
failures on every boot.

Now compares registry key to conf value and syncs if they differ.

unRAID_Essentials/unraid_api_key_renew.sh

@@ -63,8 +63,21 @@ KEY=$(echo "$EXISTING" | jq -r '.key // empty' 2>/dev/null)
 
 if [[ -n "$KEY" ]]; then
     PREVIEW="${KEY:0:8}...${KEY: -4}"
-    echo "API key valid ✅ — $VAR_NAME = $PREVIEW"
-    log "Key found in registry — no renewal needed"
+    # Always sync registry key → conf — prevents stale key mismatch after reboot/update
+    CONF_KEY=$(grep "^\s*${VAR_NAME}\s*=" "$CONF_FILE" 2>/dev/null | \
+        sed 's/.*="\(.*\)".*/\1/' | tr -d '[:space:]')
+    if [[ "$CONF_KEY" == "$KEY" ]]; then
+        echo "API key valid ✅ — $VAR_NAME = $PREVIEW"
+        log "Key in sync — no update needed"
+        exit 0
+    fi
+    log "Registry key differs from conf — syncing..."
+    if grep -q "^\s*${VAR_NAME}\s*=" "$CONF_FILE"; then
+        sed -i "s|^\(\s*${VAR_NAME}\s*=\s*\)\"[^\"]*\"|\1\"${KEY}\"|" "$CONF_FILE"
+    else
+        echo "    ${VAR_NAME}=\"${KEY}\"" >> "$CONF_FILE"
+    fi
+    warn "API key synced to conf ✅ — $VAR_NAME = $PREVIEW"
     exit 0
 fi