Undelete: deleted files, calendar events, contacts and Sieve scripts are kept and restored where they were (UD-1, UD-8 to UD-11)

Files, events and contacts are noted when deleted for good and archived by
the unindex task when retention is on; Sieve scripts are archived at
deletion. A restore goes back to its folder, calendar or address book if it
still exists, takes a free " (restored)" name, comes back inactive for
scripts, and is refused over quota with the item left archived.
Acceptance tests 6, 8 and 12.

crates/email/src/sieve/delete.rs

@@ -42,6 +42,33 @@ impl SieveScriptDelete for Server {
             ))
             .await?
         {
+            // inbuxa: UD-1: a deleted script is kept, when archiving is on
+            if let Some(retention) =
+                inbuxa_features::undelete::settings::retention(self.registry())
+                    .await?
+                    .items
+            {
+                let script = obj_
+                    .deserialize::<SieveScript>()
+                    .caused_by(trc::location!())?;
+                let content = self
+                    .blob_store()
+                    .get_blob(script.blob_hash.as_slice(), 0..usize::MAX)
+                    .await?
+                    .map(|bytes| String::from_utf8_lossy(&bytes).into_owned())
+                    .unwrap_or_default();
+                inbuxa_features::undelete::groupware::archive_sieve(
+                    &self.core.storage.data,
+                    self.registry(),
+                    account_id,
+                    &script.name,
+                    content,
+                    script.blob_hash.clone(),
+                    retention,
+                )
+                .await?;
+            }
+
             // Delete record
             batch
                 .with_account_id(account_id)