bug: memory leak

### Current Behavior

memory increase always, 无法理解

### Expected Behavior

_No response_

### Error Logs

_No response_

### Steps to Reproduce

helm deployed, chart version 2.12.6

### Environment

- APISIX version (run `apisix version`): 3.14.1-ubuntu
- Operating system (run `uname -a`): Linux apisix-5fcbddfb59-bskdt 5.10.134-18.al8.x86_64 #1 SMP Fri Dec 13 16:56:53 CST 2024 x86_64 x86_64 x86_64 GNU/Linux
- OpenResty / Nginx version (run `openresty -V` or `nginx -V`): nginx version: openresty/1.27.1.2
built by gcc 13.3.0 (Ubuntu 13.3.0-6ubuntu2~24.04)
built with OpenSSL 3.4.1 11 Feb 2025
TLS SNI support enabled
configure arguments: --prefix=/usr/local/openresty/nginx --with-cc-opt='-O2 -DAPISIX_RUNTIME_VER=1.3.2 -DNGX_LUA_ABORT_AT_PANIC -I/usr/local/openresty/zlib/include -I/usr/local/openresty/pcre/include -I/usr/local/openresty/openssl3/include' --add-module=../ngx_devel_kit-0.3.3 --add-module=../echo-nginx-module-0.63 --add-module=../xss-nginx-module-0.06 --add-module=../ngx_coolkit-0.2 --add-module=../set-misc-nginx-module-0.33 --add-module=../form-input-nginx-module-0.12 --add-module=../encrypted-session-nginx-module-0.09 --add-module=../srcache-nginx-module-0.33 --add-module=../ngx_lua-0.10.28 --add-module=../ngx_lua_upstream-0.07 --add-module=../headers-more-nginx-module-0.37 --add-module=../array-var-nginx-module-0.06 --add-module=../memc-nginx-module-0.20 --add-module=../redis2-nginx-module-0.15 --add-module=../redis-nginx-module-0.3.9 --add-module=../ngx_stream_lua-0.0.16 --with-ld-opt='-Wl,-rpath,/usr/local/openresty/luajit/lib -Wl,-rpath,/usr/local/openresty/wasmtime-c-api/lib -L/usr/local/openresty/zlib/lib -L/usr/local/openresty/pcre/lib -L/usr/local/openresty/openssl3/lib -Wl,-rpath,/usr/local/openresty/zlib/lib:/usr/local/openresty/pcre/lib:/usr/local/openresty/openssl3/lib' --add-module=/tmp/tmp.iBso3vORdI/openresty-1.27.1.2/../mod_dubbo-1.0.2 --add-module=/tmp/tmp.iBso3vORdI/openresty-1.27.1.2/../ngx_multi_upstream_module-1.3.2 --add-module=/tmp/tmp.iBso3vORdI/openresty-1.27.1.2/../apisix-nginx-module-1.19.2 --add-module=/tmp/tmp.iBso3vORdI/openresty-1.27.1.2/../apisix-nginx-module-1.19.2/src/stream --add-module=/tmp/tmp.iBso3vORdI/openresty-1.27.1.2/../apisix-nginx-module-1.19.2/src/meta --add-module=/tmp/tmp.iBso3vORdI/openresty-1.27.1.2/../wasm-nginx-module-0.7.0 --add-module=/tmp/tmp.iBso3vORdI/openresty-1.27.1.2/../lua-var-nginx-module-v0.5.3 --add-module=/tmp/tmp.iBso3vORdI/openresty-1.27.1.2/../lua-resty-events-0.2.0 --with-poll_module --with-pcre-jit --with-stream --with-stream_ssl_module --with-stream_ssl_preread_module --with-http_v2_module --with-http_v3_module --without-mail_pop3_module --without-mail_imap_module --without-mail_smtp_module --with-http_stub_status_module --with-http_realip_module --with-http_addition_module --with-http_auth_request_module --with-http_secure_link_module --with-http_random_index_module --with-http_gzip_static_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-threads --with-compat --with-stream --with-http_ssl_module
- etcd version, if relevant (run `curl http://127.0.0.1:9090/v1/server_info`):
- APISIX Dashboard version, if relevant:
- Plugin runner version, for issues related to plugin runners:
- LuaRocks version, for installation issues (run `luarocks --version`):

Start with the Helm deployment using APISIX 3.14.1 and chart 2.12.6, then reproduce the reported memory increase while monitoring the process over time. The issue does not name a component, file, test, traffic pattern, or expected memory limit, so a useful outcome first requires narrowing the leak to a reproducible subsystem and documenting how it is verified.

Written by the indexing model from the issue text.