fix(dav): properly handle metadata

[susnux]

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI

[susnux]

/backport to stable34

[susnux]

/backport to stable33

[susnux]

/backport to stable32

[susnux]

/backport to stable31

[susnux]

/backport to stable30

[susnux]

/backport to stable29

[susnux]

/backport to stable28

[backportbot]

The backport to stable28 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable28
git pull origin stable28

# Create the new backport branch
git checkout -b backport/3705/stable28

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick c8ae54db

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/3705/stable28

Error: Failed to check for changes with origin/stable28: No changes found in backport branch

---

Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

[backportbot]

The backport to stable29 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable29
git pull origin stable29

# Create the new backport branch
git checkout -b backport/3705/stable29

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick c8ae54db

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/3705/stable29

Error: Failed to check for changes with origin/stable29: No changes found in backport branch

---

Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

[backportbot]

The backport to stable30 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable30
git pull origin stable30

# Create the new backport branch
git checkout -b backport/3705/stable30

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick c8ae54db

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/3705/stable30

Error: Failed to check for changes with origin/stable30: No changes found in backport branch

---

Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.