Let BaRISTA encode recordings with different montages - #1175

* Restore BaRISTA model for review (#1171)

* Simplify BaRISTA and fix model contract edge cases

* Read BaRISTA spatial indices from dataset metadata

* Preserve shared class targets with unique MNE event IDs

* Link BaRISTA release note to the restored PR

* changes to allow for different n_chans (#1175)

Co-authored-by: Bru <[email protected]>

* Simplify BaRISTA spatial setup and license note

* Add BaRISTA figure and verify conversion of released weights

* Publish the converted BaRISTA encoders to the Hub

Make the converter the single recipe that ships with the weights: it now
writes a model card and copies itself and NOTICE.txt into each Hub
directory, and --push-to uploads them through BaRISTA.push_to_hub.

The published encoders pool by mean so one file serves any montage and
window length, and the class docstring points at the three repositories.

* Publish BaRISTA encoders without the untrained head

Co-authored-by: Cursor <[email protected]>

* fix: validate BaRISTA forward indices and align the coordinate fallback

- Move spatial indices passed to forward onto the embedding device and
  range-check them in eager mode (clear ValueError instead of IndexError;
  export/TorchScript/compile paths unchanged).
- Reorder the MNE coordinate fallback to the (left, inferior, posterior)
  columns of the released tables; negated RAS alone gave (L, P, I).
- Drop the converter's --pooling learned option, which saved a randomly
  initialised read-out: the releases carry no pooling weights.
- Docstring opening follows the "<Name> from <Author> et al" convention.
- Add test_barista.py: region scales, per-forward montages, invalid
  indices, the learned-pooling grid check and the coordinate order.

* BaRISTA: keep the conversion script on the Hub, link the license

The converter now lives only in the braindecode/BaRISTA-{coords,parcels,lobes}
Hub repositories (synced with this PR's version); the docstring points there
and the license note is a single link.

* Keep BaRISTA notice concise with upstream license link

* Integrate BaRISTA coverage into existing model tests

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Co-authored-by: Julien GADONNEIX <[email protected]>
Co-authored-by: Cursor <[email protected]>