option to disable md5

[mlapaglia]

closes: #235

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.71%. Comparing base (0ee810d) to head (6e29ca4).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #236      +/-   ##
===========================================
+ Coverage    79.68%   79.71%   +0.03%     
===========================================
  Files          147      147              
  Lines        13870    13873       +3     
===========================================
+ Hits         11052    11059       +7     
+ Misses        2818     2814       -4     

Flag	Coverage Δ
e2e	0.00% <0.00%> (ø)
integration	45.85% <33.33%> (-0.01%)	⬇️
unit	71.21% <100.00%> (+0.03%)	⬆️

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[Copilot]

Pull request overview

Adds a configurable SFTP option to disable rclone’s server-side checksum/hash checks (to support restricted SFTP servers that cannot execute md5sum/sha1sum), exposing it in the UI and validating behavior via unit tests.

Changes:

• Add disable_server_side_checksums to SFTPStorageConfig and wire it to rclone’s --sftp-disable-hashcheck.
• Add UI field to toggle server-side checksums for SFTP sync locations.
• Add new unit test module covering SFTP config validation and the presence/absence of the rclone flag.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 7 comments.

File	Description
src/borgitory/services/cloud_providers/storage/sftp_storage.py	Adds the config flag and appends --sftp-disable-hashcheck during SFTP sync.
src/borgitory/templates/partials/cloud_sync/providers/sftp/sftp_fields.html	Adds a “Server-Side Checksums” selector to the SFTP provider form.
tests/unit/cloud_providers/test_sftp_storage.py	Introduces new unit tests for config validation and command construction.

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