fix: refactor organization creation payload to use jq for JSON formatting

phase1_gitea_unraid.sh

@@ -213,10 +213,14 @@ log_step 9 "Creating organization '${GITEA_ORG_NAME}'..."
 if curl -sf -H "Authorization: token ${GITEA_ADMIN_TOKEN}" "${GITEA_INTERNAL_URL}/api/v1/orgs/${GITEA_ORG_NAME}" -o /dev/null 2>/dev/null; then
   log_info "Organization already exists — skipping"
 else
+  ORG_PAYLOAD=$(jq -n \
+    --arg username "$GITEA_ORG_NAME" \
+    --arg full_name "$GITEA_INSTANCE_NAME" \
+    '{username: $username, full_name: $full_name, visibility: "public"}')
   curl -sf -X POST \
     -H "Authorization: token ${GITEA_ADMIN_TOKEN}" \
     -H "Content-Type: application/json" \
-    -d "{\"username\":\"${GITEA_ORG_NAME}\",\"full_name\":\"${GITEA_INSTANCE_NAME}\",\"visibility\":\"public\"}" \
+    -d "$ORG_PAYLOAD" \
     "${GITEA_INTERNAL_URL}/api/v1/orgs" -o /dev/null
 
   if curl -sf -H "Authorization: token ${GITEA_ADMIN_TOKEN}" "${GITEA_INTERNAL_URL}/api/v1/orgs/${GITEA_ORG_NAME}" -o /dev/null 2>/dev/null; then