ci(test): install FUSE dependencies for cross-device test

The `cross_device_excludes_mount` test requires `fuse2fs` (from
e2fsprogs) and `fusermount3` (from fuse3) to mount an ext2 image via
FUSE. Install these packages on Linux runners in both test.yaml and
deploy.yaml so the test can run in CI without being skipped.

https://claude.ai/code/session_01LfpnUZrgq93MVZgA3KVqE6

Author: claude

.github/workflows/deploy.yaml

@@ -29,6 +29,10 @@ jobs:
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > $installer
           bash $installer --default-toolchain $(cat rust-toolchain) -y
 
+      - name: Install FUSE dependencies
+        if: runner.os == 'Linux'
+        run: sudo apt-get install -y e2fsprogs fuse3
+
       - name: Test (dev)
         shell: bash
         env:

.github/workflows/test.yaml

@@ -42,6 +42,10 @@ jobs:
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > $installer
           bash $installer --default-toolchain $(cat rust-toolchain) -y
 
+      - name: Install FUSE dependencies
+        if: runner.os == 'Linux'
+        run: sudo apt-get install -y e2fsprogs fuse3
+
       - name: Test (dev)
         shell: bash
         env: