Nginx-otel doesn't compile on debian bookworm 12.9

[aldemira]

Describe the bug

I'm tryting to compile nginx-otel as module on debian bookworm (12.9). And it fails with:

[100%] Building CXX object CMakeFiles/ngx_otel_module.dir/src/http_module.cpp.o
/opt/nginx-otel/src/http_module.cpp: In function 'ngx_int_t {anonymous}::setHeader(ngx_http_request_t*, StrView, StrView)':
/opt/nginx-otel/src/http_module.cpp:260:17: error: 'struct ngx_table_elt_t' has no member named 'next'
  260 |         header->next = NULL;
      |                 ^~~~
make[2]: *** [CMakeFiles/ngx_otel_module.dir/build.make:98: CMakeFiles/ngx_otel_module.dir/src/http_module.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:971: CMakeFiles/ngx_otel_module.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

To reproduce

Steps to reproduce the behavior:
Using debian bookworm 12.9 or the latest debian:bookworm-slim container:

apt-get install nginx-dev
 cd /usr/share/nginx/src
 ./configure 	--prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=stderr --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid 	--modules-path=/usr/lib/nginx/modules --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi 	--http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-compat --with-threads --with-pcre-jit --with-http_ssl_module --with-http_stub_status_module 			--with-http_realip_module --with-http_auth_request_module --with-http_v2_module --with-http_dav_module 	--with-http_slice_module
 cd /opt
 apt-get install -y cmake build-essential libssl-dev zlib1g-dev libpcre3-dev pkg-config libc-ares-dev libre2-dev git
 git clone https://github.com/nginxinc/nginx-otel.git
 cd nginx-otel
 mkdir build && cd build
 cmake -DNGX_OTEL_NGINX_BUILD_DIR=/usr/share/nginx/src/objs ..
 make -j4

Expected behavior

I'm expecting the compilation to complete successfully.

Your environment

• Version/release of this project or specific commit
  I'm using debian:bookwork-slim container. But any debian bookworm can work.
• Target deployment platform
  Debian

Additional context

Looking at /usr/share/nginx/src/src/core/ngx_hash.h there's no next in ngx_table_elt_t:

typedef struct {
    ngx_uint_t        hash;
    ngx_str_t         key;
    ngx_str_t         value;
    u_char           *lowcase_key;
} ngx_table_elt_t;

[p-pautov]

That indicates pre 1.23 nginx. Say, if you remove this line (header->next = NULL;), does it work for you otherwise?