Add recording to Shared Memory

src/config.cpp

@@ -140,6 +140,9 @@ void AppConfig::load_from_env(const char* env_path) {
     if (!vs_s.empty()) video_segment_sec = std::stoi(vs_s);
     auto ofps_s = get_env("OUTPUT_FPS");
     if (!ofps_s.empty()) output_fps = std::stoi(ofps_s);
+    auto rds_s = get_env("RECORD_DELAY_SECONDS");
+    if (!rds_s.empty()) record_delay_seconds = std::stof(rds_s);
+    record_shm_dir = get_env("RECORD_SHM_DIR", record_shm_dir);
 
     auto lse_s = get_env("LIVE_STREAM_ENABLED");
     live_stream_enabled = (lse_s == "true");