Fix stage_1 NWB packaging

**Describe the bug**
The STAGE_1 NWB files currently do not include the stimulus parameters for the gratings blocks, specifically the values for temporal frequency, orientation, or contrast on each individual stimulus presentation.

**To Reproduce**
Asking Claude to plot a contrast or temporal frequency tuning curve results in an answer of "i cant" because the relevant values are not there.

**Expected behavior**
the stimulus table should have columns for each parameter (TF, ori, contrast, etc). I believe the existing stim_table.csvs already have these columns, so it should be straightforward to reproduce in the NWB file.

**Additional context**
I can help with this and hand off the solution to @arielleleon for implementation in the main packaging capsule