Implement the in-process structured entry editor

Closes #21

crates/storage/src/write.rs

@@ -337,6 +337,20 @@ impl<'a> VaultWriter<'a> {
         editor_name: &str,
         signing: Option<&SigningPolicy>,
         committer: &mut impl EntryCommitter,
+    ) -> Result<WriteOutcome, WriteError> {
+        self.finish_edit_recoverable(&session, replacement, editor_name, signing, committer)
+    }
+
+    /// Finish an edit while retaining the session when validation, encryption,
+    /// conflict detection, or commit orchestration fails.
+    #[allow(clippy::too_many_arguments)]
+    pub fn finish_edit_recoverable(
+        &self,
+        session: &EditSession,
+        replacement: SecretBytes,
+        editor_name: &str,
+        signing: Option<&SigningPolicy>,
+        committer: &mut impl EntryCommitter,
     ) -> Result<WriteOutcome, WriteError> {
         if replacement.expose() == session.plaintext.expose() {
             return Err(WriteError::Unchanged);
@@ -375,7 +389,7 @@ impl<'a> VaultWriter<'a> {
             return Err(WriteError::Commit(error));
         }
         Ok(WriteOutcome {
-            path: session.path,
+            path: session.path.clone(),
             action: EntryAction::Edit,
         })
     }