Upgraded the restore command to download previous session artifcats when configured as inputs for the current session analyze stage

docs/internal/workspace.md

@@ -18,7 +18,7 @@ Outputs:
 ## Boundaries
 Owns:
 - Session-level path layout (`inputs/`, `audio/`, `transcripts/`, `artifacts/`, `reports/`, `logs/`, `config/`, `current/`, `runs/`, `previous/`)
-  - `previous/manifest.json` and `previous/artifacts/**` are reserved for prepared previous-session state
+  - `previous/manifest.json` and `previous/artifacts/**` are reserved for previous-session cache state materialized by `prepare` or `restore`
 - Run-local stage sandbox layout under `runs/{run_id}/{stage}/`
 - Session lock acquisition/release (`.lock`)
 
@@ -46,6 +46,7 @@ None directly in this subsystem. Stages may use object storage adapters and then
 - During each run, stage outputs are often written run-local first (`runs/{run_id}/{stage}/outputs/...`) and promoted to canonical session paths after stage success.
 - `manifest.Artifacts` entries record `ProducerRunID` for durable outputs.
 - For S3 audio sessions, `prepare` records work/cache paths, S3 provenance, and spool path when the invocation downloaded the object.
+- `previous/**` is reconstructed from configured previous-session requirements; restore uses the previous session's committed current archive rather than treating current-session archived `previous/**` as authoritative.
 - Durable cache state under `pipeline.cache.root` is not workspace state and is preserved by default by `narratio clean`.
 - `narratio clean --session-id <id>` removes the session work root and session spool root.
 - `narratio clean --all` removes all local session work under `workspace.root/work` and spool children under `spool.root`.