refactor: remove vendored binaries and raw assets from repo

docs/deployment-vm.md

@@ -29,6 +29,13 @@ The service needs:
 - a writable temp directory
 - a free port range for `storescp`
 
+If you do not manage these assets globally on the VM, you can stage them locally first:
+
+```bash
+scripts/setup-dcmtk.sh --source-dir /path/to/dcmtk/bin --install-dir /opt/dicom-iso/dcmtk-bin
+scripts/setup-microdicom.sh --source-dir /path/to/microdicom --install-dir /opt/dicom-iso/microdicom
+```
+
 ## Build note
 The build environment cannot depend on public internet access.
 That means the binary must be built through an approved offline-friendly path.

docs/repo-size-cleanup.md

@@ -0,0 +1,18 @@
+# Repo size cleanup
+
+Implemented in the working tree:
+- removed tracked binaries from `dcmtk-bin/`
+- removed tracked raw assets from `legacy/raw/`
+- added `.gitignore` protections
+- added setup scripts for DCMTK and MicroDicom
+
+## Finish the cleanup in git history
+Rewriting history is still required to shrink the remote repository size.
+
+```bash
+git filter-repo --path dcmtk-bin --path legacy/raw --invert-paths
+git push --force --all
+git push --force --tags
+```
+
+Coordinate this with any collaborators first.