longchun4835 created an issue (kamailio/kamailio#4178)

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### Description

Using function sip_trace_mode() with parameter d to enable dialog tracing mode logs: ``` BUG: siptrace [siptrace.c:1671]: add_info_xavp(): URI should be in raw format here ERROR: siptrace [siptrace.c:888]: sip_trace_helper(): failed to serialize siptrace info! Won't trace dialog! ```

### Troubleshooting

#### Reproduction my module parameters: ``` #!ifdef WITH_HOMER loadmodule "siptrace.so" modparam("siptrace", "duplicate_uri", HOMER_URL) modparam("siptrace", "hep_mode_on", 1) modparam("siptrace", "trace_to_database", 0) modparam("siptrace", "trace_flag", 22) modparam("siptrace", "trace_on", 1) modparam("siptrace", "hep_version", 3) modparam("siptrace", "hep_capture_id", HOMER_HEP_ID) #!endif

...

request_route { ... if (is_method("INVITE")) { sip_trace_mode("d"); } } ```

### Possible Solutions

I checked the source code and found that the issue occurs when sip_trace_helper() is called inside the ki_sip_trace_mode() function, with the third parameter (duri) set to NULL. I don’t quite understand the logic behind passing NULL does this mean that the 'D' parameter will never working when calling sip_trace_mode()?

Additionally, I have another question: in the sip_trace_helper() function, why does it call trace_transaction() instead of trace_dialog() when strace_type == SIPTRACE_DIALOG?

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` version: kamailio 5.6.4 (x86_64/linux) a004cf flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: a004cf compiled on 09:14:30 Jan 23 2025 with gcc 8.3.1 ```

* **Operating System**:

``` NAME="CentOS Linux" VERSION="7 (Core)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="7" PRETTY_NAME="CentOS Linux 7 (Core)" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:7" HOME_URL="https://www.centos.org/" BUG_REPORT_URL="https://bugs.centos.org/" ```