[Feature] Full user control over the duplicate counter in the storage template

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature The storage template exists so that administrators can impose their own filename convention instead of Immich's: path layout, date format, element order, separators, all user-defined. The duplicate counter is the single exception. I would like it brought under the same user control as everything else in the template. Current behaviour server/src/services/storage-template.service.ts renders the template once, then appends the counter inside the existence loop: Four decisions are taken on the user's behalf there, none of them changeable: | | currently hard-coded as | | --- | --- | | suffix indicator | + | | padding | none — +9, +10 | | start value | 1 | | position | always last, after everything the template produced | The request Make all four user-definable, so the whole filename comes from the template. …