Update GitHub infrastructure (#1036)

* Increase fetch depth to avoid missing the commit

The target commit might not be the latest of the target branch.

* Add CODEOWNERS file

* dependencies: pin shapley version down to 2.0

---------

Co-authored-by: emanuel-schmid <schmide@ethz.ch>

Author: peanutfun

.github/CODEOWNERS

@@ -0,0 +1,7 @@
+# This is a comment.
+# Each line is a file pattern followed by one or more owners.
+
+# These owners will be the default owners for everything in
+# the repo. Unless a later match takes precedence, they will
+# be requested for review when someone opens a pull request.
+*       @emanuel-schmid @chahank @peanutfun

.github/workflows/pull-request.yml

@@ -16,7 +16,7 @@ jobs:
           ref: ${{ github.event.pull_request.head.sha }}
       -
         name: Checkout target commit
-        run: git -c protocol.version=2 fetch --no-tags --prune --no-recurse-submodules --depth=1 origin ${{ github.event.pull_request.base.ref }}
+        run: git -c protocol.version=2 fetch --no-tags --prune --no-recurse-submodules --depth=50 origin ${{ github.event.pull_request.base.ref }}
       -
         name: Set up Python 3.11
         uses: actions/setup-python@v5

requirements/env_climada.yml

@@ -35,6 +35,7 @@ dependencies:
   - seaborn>=0.13
   - scikit-learn>=1.6
   - scipy>=1.14,<1.15  # 1.15 is not compatible with climada_petals, climada_petals.engine.test.test_supplychain fails with "'Series' has no attribute 'nonzero'"
+  - shapely<2.1  # in 2.1 'shapely.ops' has no attribute 'cascaded_union' anymore, which is used in black_marble
   - sparse>=0.15
   - statsmodels>=0.14
   - tabulate>=0.9