feat(apisix): add Cloudron package

- Implements Apache APISIX packaging for Cloudron platform.
- Includes Dockerfile, CloudronManifest.json, and start.sh.
- Configured to use Cloudron's etcd addon.

🤖 Generated with Gemini CLI
Co-Authored-By: Gemini <noreply@google.com>

CloudronPackages/APISIX/apisix-source/apisix/stream/xrpc/metrics.lua

@@ -0,0 +1,50 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one or more
+-- contributor license agreements.  See the NOTICE file distributed with
+-- this work for additional information regarding copyright ownership.
+-- The ASF licenses this file to You under the Apache License, Version 2.0
+-- (the "License"); you may not use this file except in compliance with
+-- the License.  You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+local require = require
+local core = require("apisix.core")
+local pairs = pairs
+local pcall = pcall
+
+
+local _M = {}
+local hubs = {}
+
+
+function _M.store(prometheus, name)
+    local ok, m = pcall(require, "apisix.stream.xrpc.protocols." .. name .. ".metrics")
+    if not ok then
+        core.log.notice("no metric for protocol ", name)
+        return
+    end
+
+    local hub = {}
+    for metric, conf in pairs(m) do
+        core.log.notice("register metric ", metric, " for protocol ", name)
+        hub[metric] = prometheus[conf.type](prometheus, name .. '_' .. metric,
+                                            conf.help, conf.labels, conf.buckets)
+    end
+
+    hubs[name] = hub
+end
+
+
+function _M.load(name)
+    return hubs[name]
+end
+
+
+return _M