fixup! feat(observability): add OpenTelemetry logs

kong/observability/logs.lua

@@ -23,6 +23,7 @@ local ngx = ngx
 local kong = kong
 local table = table
 local tostring = tostring
+local native_ngx_log = _G.native_ngx_log or ngx.log
 
 local ngx_null = ngx.null
 local table_pack = table.pack -- luacheck: ignore
@@ -42,7 +43,7 @@ local function configured_log_level()
   if not ok then
     -- This is unexpected outside of the context of unit tests
     local level_str = kong.configuration.log_level
-    _G.native_ngx_log(ngx.WARN,
+    native_ngx_log(ngx.WARN,
       "[observability] OpenTelemetry logs failed reading dynamic log level. " ..
       "Using log level: " .. level_str .. " from configuration."
     )
@@ -145,6 +146,9 @@ function _M.maybe_push(stack_level, log_level, ...)
 
   -- return if log buffer is full
   if #log_buffer >= max_logs then
+    native_ngx_log(ngx.NOTICE,
+      "[observability] OpenTelemetry logs buffer is full: dropping log entry."
+    )
     return
   end