Provide call audio diagnostics without consuming stats events

src/call/call_audio.c

@@ -557,6 +557,16 @@ int call_audio_get_clock(uint64_t call_id, int64_t now_us, struct call_clock_sna
     return present ? 0 : -1;
 }
 
+int call_audio_get_diagnostics(uint64_t call_id, struct call_jitter_diagnostics* out) {
+    if (!out) { DEBUG_ERROR(DEBUG_CATEGORY_CALL, "call diagnostics: missing output"); return -1; }
+    memset(out, 0, sizeof(*out));
+    pthread_mutex_lock(&g_mtx);
+    int present = g_active && call_id == g_call_id && g_vj;
+    if (present) call_jitter_get_diagnostics(g_vj, out, 0);
+    pthread_mutex_unlock(&g_mtx);
+    return present ? 0 : -1;
+}
+
 /* ── uasync-поток: метрики ── */
 
 int call_audio_get_stats(uint64_t call_id, int* buffer_ms, int* tempo_x100,

src/call/call_audio.h

@@ -72,6 +72,8 @@ void call_audio_on_media(struct UTUN_INSTANCE* inst, uint64_t call_id,
 void call_audio_playback_progress(uint64_t call_id, uint64_t epoch, uint64_t position,
                                   int64_t at_us, int64_t now_us, int measured);
 int call_audio_get_clock(uint64_t call_id, int64_t now_us, struct call_clock_snapshot* out);
+/* Любой поток: диагностический снимок без потребления событий CALL_STATS. */
+int call_audio_get_diagnostics(uint64_t call_id, struct call_jitter_diagnostics* out);
 
 /* uasync-поток: метрики джиттер-буфера для CALL_STATS (dropped/underruns — необязательные). */
 int  call_audio_get_stats(uint64_t call_id, int* buffer_ms, int* tempo_x100,