fix(ci): use shallow clone with tag fetch to avoid 45k commit download

fetch-depth: 0 downloads the entire FreeCAD history (45k+ commits),
causing 13+ minute checkout times. Switch to fetch-depth: 1 with a
separate lightweight tag fetch for git describe.

.gitea/workflows/build.yml

@@ -34,7 +34,10 @@ jobs:
         uses: https://github.com/actions/checkout@v4
         with:
           submodules: recursive
-          fetch-depth: 0
+          fetch-depth: 1
+
+      - name: Fetch tags (for git describe)
+        run: git fetch --tags --no-recurse-submodules origin
 
       - name: Install pixi
         run: |

.gitea/workflows/release.yml

@@ -43,8 +43,10 @@ jobs:
         uses: https://github.com/actions/checkout@v4
         with:
           submodules: recursive
-          fetch-depth: 0
-          fetch-tags: true
+          fetch-depth: 1
+
+      - name: Fetch tags
+        run: git fetch --tags --no-recurse-submodules origin
 
       - name: Install pixi
         run: |
@@ -140,8 +142,10 @@ jobs:
         uses: https://github.com/actions/checkout@v4
         with:
           submodules: recursive
-          fetch-depth: 0
-          fetch-tags: true
+          fetch-depth: 1
+
+      - name: Fetch tags
+        run: git fetch --tags --no-recurse-submodules origin
 
       - name: Install pixi
         run: |
@@ -217,8 +221,11 @@ jobs:
         uses: https://github.com/actions/checkout@v4
         with:
           submodules: recursive
-          fetch-depth: 0
-          fetch-tags: true
+          fetch-depth: 1
+
+      - name: Fetch tags
+        shell: bash
+        run: git fetch --tags --no-recurse-submodules origin
 
       - name: Install pixi
         shell: bash