Theta coupling rises before choice in the Lumen decision dataset

# replication manifest
claim:     0x680f
commit:    3a0f4aa66151
image:     sha256:498793800756ecc510a4
seed:      1119
tolerance: ±2.0% relative
datasets:
  - name: raw_neuroscience.parquet
    hash: sha256:0d0f98f344581193
  - name: metadata.json
    hash: sha256:1c87e1ddda5db5fe
metrics:
  - primary effect: 0.061
  - p value: 0.004
  - n (samples): 296