fix(ci): pin charmcraft to version 3.2.3

Revert charmcraft to version 3.2.3 to get around caching issue. Also include some minor cosmetic changes such as license header updates and renaming jobs from Release -> Publish since that is the name of the workflow file.

Signed-off-by: Jason C. Nucciarone <[email protected]>

.github/workflows/ci.yaml

@@ -1,4 +1,4 @@
-# Copyright 2024 Canonical Ltd.
+# Copyright 2024-2025 Canonical Ltd.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -115,6 +115,13 @@ jobs:
         uses: charmed-kubernetes/actions-operator@main
         with:
           provider: lxd
-          juju-channel: 3.4/stable
+          juju-channel: 3.6/stable
+      # TODO: https://github.com/canonical/charmcraft/issues/2125 -
+      #   Remove pin to charmcraft 3.2.3 once `FileExistsError` is fixed
+      #   when accessing the charmcraft build cache in parallel builds.
+      - name: Revert to charmcraft 3.2.3
+        run: |
+          sudo snap refresh charmcraft --revision=5858
+          sudo snap refresh charmcraft --hold
       - name: Run tests
         run: just repo integration

.github/workflows/publish.yaml

@@ -1,5 +1,16 @@
-# Copyright 2024 Canonical Ltd.
-# See LICENSE for licensing details.
+# Copyright 2024-2025 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 name: Release to latest/edge
 
@@ -43,13 +54,20 @@ jobs:
         uses: canonical/[email protected]
         with:
           channel: 5.21/stable
-      - name: Release updated libraries to Charmhub
+      # TODO: https://github.com/canonical/charmcraft/issues/2125 -
+      #   Remove pin to charmcraft 3.2.3 once `FileExistsError` is fixed
+      #   when accessing the charmcraft build cache in parallel builds.
+      - name: Revert to charmcraft 3.2.3
+        run: |
+          sudo snap refresh charmcraft --revision=5858
+          sudo snap refresh charmcraft --hold
+      - name: Publish updated charm libraries to Charmhub
         uses: canonical/charming-actions/[email protected]
         with:
           credentials: "${{ secrets.CHARMCRAFT_AUTH }}"
           github-token: "${{ secrets.GITHUB_TOKEN }}"
           charm-path: "./_build/${{ matrix.charm }}"
-      - name: Upload charm to Charmhub
+      - name: Publish charm to Charmhub
         uses: canonical/charming-actions/[email protected]
         with:
           credentials: "${{ secrets.CHARMCRAFT_AUTH }}"