pyproject: pin jet-array==0.1.0a1 for reproducibility

Lock the dependency to the exact PyPI version corresponding to the
paper-submission snapshot. Future jet-array releases won't drift the
acopula install for anyone reproducing results from the supplement.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: thisiscam

pyproject.toml

@@ -32,7 +32,7 @@ classifiers = [
 ]
 dependencies = [
     "jax>=0.8,<0.9",
-    "jet-array>=0.1.0a1",
+    "jet-array==0.1.0a1",
     "jaxopt>=0.8",
     "optimistix>=0.0.6",
     "quadax>=0.2.9",