The DSpark and DFlash configs set `block_size=7` but name their experiments
`*_block8_*`. The Eagle3 configs already follow the parameter value in their
names (`*_ttt7_*` with `ttt_length=7`), and the released checkpoints in the
README are published as `*_block7_*`.
Rename the experiments to `*_block7_*` so the default checkpoint directory
matches both `block_size=7` and the published checkpoint names, and update
the eval.sh / README examples that reference that path.
Daoyuan Li