address review: ipairs for protocol names, capture deep_merge return

Author: nic-6443

apisix/plugins/ai-providers/base.lua

@@ -189,7 +189,7 @@ function _M.build_request(self, ctx, conf, request_body, opts)
         if patch then
             core.log.info("applying request_body override for target protocol '",
                           ctx.ai_target_protocol, "'")
-            deep_merge(request_body, patch)
+            request_body = deep_merge(request_body, patch)
         end
     end
     params.body = request_body

apisix/plugins/ai-proxy/schema.lua

@@ -17,7 +17,7 @@
 local schema_def = require("apisix.schema_def")
 local ai_providers_schema = require("apisix.plugins.ai-providers.schema")
 local protocols = require("apisix.plugins.ai-protocols")
-local pairs = pairs
+local ipairs = ipairs
 
 local _M = {}
 
@@ -78,7 +78,7 @@ local model_options_schema = {
 -- Each registered protocol gets an optional "any-shape object" entry.
 -- Values are applied via deep-merge after the model_options flat overwrite.
 local request_body_override_properties = {}
-for _, proto_name in pairs(protocols.names()) do
+for _, proto_name in ipairs(protocols.names()) do
     request_body_override_properties[proto_name] = {
         type = "object",
         description = "Deep-merged into the outgoing request body when the "