Record open project history closeout

docs/modernization/tasks.md

@@ -1778,6 +1778,43 @@ Completed Task Log:
 | --- | --- | ---: | --- | --- |
 | 2026-06-15 | ADP-047 | no score movement | `powershell -ExecutionPolicy Bypass -File scripts\\automation\\quiet-validate.ps1 -BuildTargets pano_cli -TestRegex "pp_app_core_document_route|pp_app_core_document_session"` | `2f2b9621` |
 
+### ADP-048 - Extract Document-Open History Helper
+
+Status: Done
+Score: no score movement
+Debt: `DEBT-0039`
+Scope: `src/legacy_document_open_services.cpp` only
+
+Closeout: `c2083565`
+
+Goal:
+
+Reduce the inline retained project-open history-planning surface by
+extracting the `plan_document_open_history(route)` call and failure logging
+from `open_legacy_project()` into a focused helper while preserving current
+behavior.
+
+Done Checks:
+
+- The retained project-open history-planning call no longer lives inline in
+  `open_legacy_project()`.
+- The retained project-open history path now routes through a focused helper in
+  `src/legacy_document_open_services.cpp`.
+- `DEBT-0039` and the roadmap note the reduced remaining document-open bridge
+  surface.
+
+Validation:
+
+```powershell
+powershell -ExecutionPolicy Bypass -File scripts\\automation\\quiet-validate.ps1 -BuildTargets pano_cli -TestRegex "pp_app_core_document_route|pp_app_core_document_session"
+```
+
+Completed Task Log:
+
+| Date | Task | Score | Validation | Commit |
+| --- | --- | ---: | --- | --- |
+| 2026-06-15 | ADP-048 | no score movement | `powershell -ExecutionPolicy Bypass -File scripts\\automation\\quiet-validate.ps1 -BuildTargets pano_cli -TestRegex "pp_app_core_document_route|pp_app_core_document_session"` | `c2083565` |
+
 ### RND-001 - Make Pure Equirectangular Export The Primary Success Path
 
 Status: Done