update environment configuration for local development, enhance database initialization, and improve Nginx routing for admin access

backend/playout/start-playout.sh

@@ -34,8 +34,9 @@ while true; do
     -f hls \
     -hls_time "${HLS_SEGMENT_DURATION}" \
     -hls_list_size "${HLS_WINDOW_SIZE}" \
+    -strftime 1 \
     -hls_flags delete_segments+append_list \
-    -hls_segment_filename "/app/hls/segment_%03d.ts" \
+    -hls_segment_filename "/app/hls/segment_%Y%m%d_%H%M%S.ts" \
     "/app/hls/playlist.m3u8" || echo "FFmpeg exited with error (will restart in 5s per ADR-001 resilience requirements)..."
 
   echo "Playout loop crashed or ended. Restarting in 5 seconds..."