fix: exclude document history from split fragments

CHANGELOG.md

@@ -17,6 +17,12 @@ The workspace `Cargo.toml` `[workspace.package] version` is the single source fo
 
 **Fixed**
 
+- Section, saved-page and typed-range splits exclude the source's whole HWP5 `/DocHistory`
+  from every fragment and ledger the removed storage and its streams. `--strict` refuses this
+  reported loss before fragment publication. Native XMLTemplate and HWPX extra parts remain
+  unchanged to preserve opaque schema/package dependencies; ordinary convert, edit and identity
+  round-trips retain their existing history behavior ([#449](https://github.com/STAIxBWLB/hwp-cli/issues/449)).
+
 - Shared stage-sync and file-identity helper failures now name their phase and advise checking
   output-directory permissions and free space before rerunning. The helper error values use
   fixed Korean messages without staging/destination paths or underlying I/O error chains,

crates/hwp-cli/src/commands/split.rs

@@ -468,6 +468,7 @@ pub(crate) fn execute(
         SplitOutcome {
             fragments: vec![extracted.fragment.clone()],
             roundings: Vec::new(),
+            preservation: extracted.preservation.clone(),
         }
     } else if pages.is_empty() {
         hwp_convert::document_split::split_sections(&document)
@@ -531,6 +532,9 @@ pub(crate) fn execute(
         .with_context(|| format!("출력 디렉터리를 만들 수 없습니다: {}", out_dir.display()))?;
 
     let mut report = WriteReport::new();
+    // Writers compare the sanitized fragment with its output and cannot see source history
+    // intentionally excluded by the transform. Carry that evidence into strict/loss reporting.
+    report.preservation.extend(outcome.preservation.clone());
     let mut fragment_bytes: Vec<(PathBuf, Vec<u8>)> = Vec::with_capacity(outcome.fragments.len());
     for (fragment, destination) in outcome.fragments.iter().zip(&destinations) {
         let (write_report, output_document, bytes) =