Rename Stalwart's Sieve names for inbuxa, and fail when activation does

inbuxa accepts vnd.inbuxa.while and vnd.inbuxa.expressions, and names its
environment items vnd.inbuxa.*, with no alias for Stalwart's vnd.stalwart.*
names. A script carried over unchanged failed to compile on the target, and
the account was left with no filtering behind a single warning.

When the target lists vnd.inbuxa extensions in its sieveExtensions, export
now renames Stalwart's names in the three places they are names: the strings
of a require list, the item name of an environment test, and
${env.vnd.stalwart.*} references inside strings. A small tokenizer skips
comments and reads quoted strings and text: blocks whole, so other text that
happens to contain the name is copied unchanged. Each rename is printed.
Against a target without the inbuxa names nothing changes.

The activation call is now checked. A method error, or an active script
that could not be created, is logged as an error naming the script and
counted as a failure, so export exits non-zero instead of leaving
filtering off with one warning line.

src/sync/export.rs

@@ -1,5 +1,6 @@
 /*
  * SPDX-FileCopyrightText: 2020 Stalwart Labs LLC <[email protected]>
+ * SPDX-FileCopyrightText: 2026 John Coffey <[email protected]>
  *
  * SPDX-License-Identifier: Apache-2.0 OR MIT
  */
@@ -97,6 +98,34 @@ impl<'a> Uploader<'a> {
         Ok(id)
     }
 
+    /// As `upload_with`, but sends `bytes` in place of the stored blob: for
+    /// content rewritten on its way to the target. Cached under the same
+    /// local id, so a retry sends the rewritten bytes again.
+    fn upload_bytes_as(
+        &mut self,
+        local_id: i64,
+        content_type: &str,
+        bytes: &[u8],
+    ) -> Result<JmapId, JmapError> {
+        self.touched.push(local_id);
+        if let Some(id) = self.cache.get(&local_id) {
+            return Ok(id.clone());
+        }
+        let id = if self.net.dry_run {
+            JmapId(format!("dryrun-blob-{local_id}"))
+        } else {
+            blobxfer::upload_bytes(
+                &self.net.client,
+                &self.net.session,
+                &self.net.account,
+                content_type,
+                bytes,
+            )?
+        };
+        self.cache.insert(local_id, id.clone());
+        Ok(id)
+    }
+
     fn invalidate(&mut self, local_id: i64) {
         self.cache.remove(&local_id);
     }
@@ -435,6 +464,8 @@ mod keyed;
 
 mod sieve;
 
+mod sieve_names;
+
 mod uidtype;
 
 mod email;