Skyfay/DBackup v2.4.1 on GitHub

Multiple Bug Fixes across MSSQL, SMB, Retention, and Storage Adapters

mssql: Fixed backup abort and missing remote cleanup when SSH-transferring more than ~10 databases due to SSH channel exhaustion - the SFTP session is now cached and reused instead of opening a new channel per operation.
mssql: Fixed "Arithmetic overflow" crash in Database Explorer and Restore for databases larger than ~2 GB.
smb: Fixed .connection-test-* probe files not being deleted when sendFile throws after the remote file was already created.
retention: Fixed SMART/GFS tier overlap that incorrectly mapped multiple tiers to the same backup, causing over-aggressive deletion. (#101)
storage: Fixed file descriptor leak causing deleted .tar temp files to hold disk blocks until container restart, affecting S3, SFTP, FTP, OneDrive, and tar-utils streams. (#100)

retention: Corrected the retention algorithm abbreviation from "GVS" to "GFS" across UI, documentation, and the built-in retention template.
history: Retention execution logs now include the applied retention template name.

smb: Added unit tests for finally-block cleanup when sendFile throws and for cleanup retry when the delete itself fails.
retention: Added regression tests for GFS non-overlapping tier selection and template-name visibility in retention history. (#101)
ftp/sftp: Fixed broken upload unit tests by adding missing destroy: vi.fn() to the createReadStream mock - the adapter calls fileStream.destroy() in the finally block, which threw a TypeError without this mock method.