Cap ArviZ below 1.0 pending migration (#810)

* Cap ArviZ below 1.0 pending migration

Keep current CausalPy releases from resolving incompatible ArviZ 1.0 installs until the upstream PyMC and pymc-extras migration work lands.

Made-with: Cursor

* Fix lift test notebook compatibility on PR 810

Keep the lift test example working with newer pymc-marketing transformer APIs and normalize stale notebook output metadata so notebook schema validation passes on this branch.

Made-with: Cursor

Author: drbenvincent

environment.yml

@@ -12,7 +12,7 @@ channels:
   - conda-forge
 dependencies:
   - python>=3.12
-  - arviz>=0.14.0
+  - arviz<1.0,>=0.14.0
   - codespell
   - graphviz
   - interrogate

pyproject.toml

@@ -40,7 +40,7 @@ classifiers = [
 # For an analysis of this field vs pip's requirements files see:
 # https://packaging.python.org/discussions/install-requires-vs-requirements/
 dependencies = [
-    "arviz>=0.14.0",
+    "arviz>=0.14.0,<1.0",
     "graphviz",
     "ipython!=8.7.0",
     "jinja2",