Fix docs version display and update copyright to Gallant Lab

[Copilot]

At release time, the docs website displayed 1.3.0.dev0 instead of 1.3.0 because the docs build workflow used a shallow checkout, preventing setuptools-scm from discovering git tags and generating the correct version. Copyright was also stale (2012, James Gao).

Changes

• docs/conf.py — version: Use cortex.__version__ directly, which is populated by setuptools-scm's generated cortex/_version.py at install time, rather than relying on a hardcoded fallback:

  release = cortex.__version__
  version = ".".join(release.split(".")[:2])

• .github/workflows/build_docs.yml: Added fetch-depth: 0 to the actions/checkout step so setuptools-scm can discover git tags and produce the correct version during docs builds (matching what publish.yml already does).
• docs/conf.py — copyright: Updated from 2012, James Gao to 2012–<current year>, Gallant Lab using datetime.now().year so the year stays current automatically.
• docs/conf.py — epub metadata: Updated epub_author, epub_publisher, and epub_copyright to Gallant Lab with matching dynamic year.

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[mvdoc]

@copilot this is not good. we don't want to rely on the hardcoded version because then we'll have to keep it in sync. we want to fetch the correct version number upon release/deployment based either on the tag or the version generated by setuptools

[Copilot]

@copilot this is not good. we don't want to rely on the hardcoded version because then we'll have to keep it in sync. we want to fetch the correct version number upon release/deploymen...

You're right — relying on the hardcoded fallback defeats the purpose of setuptools-scm. In a32f042, I changed docs/conf.py to use cortex.__version__ directly (which comes from cortex/_version.py generated by setuptools-scm at install time), and also added fetch-depth: 0 to the build_docs.yml checkout step so setuptools-scm can discover git tags and produce the correct version during docs builds.