Colorizer round6: recurrent experiment completed with visual comparisons

Colorizer round6: recurrent_8 final metrics and probes

Colorizer round6: recurrent_4 final metrics and probes

Colorizer round6: recurrent_2 final metrics and probes

Colorizer round6: recurrent_1 final metrics and probes

Colorizer round6: control final metrics and probes

Colorizer round6: v3 final metrics and probes

Colorizer round6: matched recurrent trial step 2000

Colorizer round6: matched recurrent trial step 2000

Colorizer round6: matched recurrent trial step 1500

Colorizer round6: matched recurrent trial step 1000

Colorizer round6: matched recurrent trial step 500

Colorizer round6: cached targets verified and holdout frozen

Colorizer round6: CPU and FP32 GPU parity, backward and reload verified

Colorizer round6: protocol and sources before GPU training

Colorizer round6: failure report

Colorizer round6: protocol and sources before GPU training

Verify experiment artifact write access