Add post-archive cleanup policies

README.md

@@ -83,6 +83,7 @@ Implemented foundations:
 Current defaults:
 
 - `pipeline.storage.s3.root_prefix`: `dnd`
+- `pipeline.workspace.cleanup_after_archive`: `false`
 - `pipeline.spool.root`: `/var/spool/narratio`
 - `pipeline.spool.delete_audio_after_archive`: `false`
 - `pipeline.archive.enabled`: `true`
@@ -104,6 +105,12 @@ Current boundaries:
 - archive uploads `current/run_id.txt` last as the effective commit marker
 - required missing promotions fail archive
 - optional missing promotions are skipped and recorded
+- cleanup remains conservative and opt-in:
+  - `pipeline.spool.delete_audio_after_archive: true` removes only the run-scoped spool audio directory after successful archive commit
+  - `pipeline.workspace.cleanup_after_archive: true` removes only the run-scoped local workdir after successful archive commit
+  - cleanup executes only after all selected stages for the command invocation succeed
+  - cleanup does not run for failed, incomplete, skipped, or unarchived runs
+  - local development `audio_dir`/`audio_files` source inputs are never deleted by spool cleanup
 
 S3 input details and current boundaries are documented in [docs/s3-audio-input.md](docs/s3-audio-input.md).