fix: --force re-render progression, cache dir loading, and Joplin link preservation. Co-Authored-By: Fable 5 <noreply@anthropic.com>

CHANGELOG.md

@@ -46,6 +46,10 @@ consolidated here.
 - Session limiter: `--max-conversations N` / `MAX_CONVERSATIONS_PER_RUN` cap downloads per run (per provider); capped-out conversations are reported as "deferred" and resumed next run.
 - Polite pacing: `REQUEST_DELAY` (default 1.0s, ±25% jitter, `0` disables) between consecutive API requests, with the existing 429 backoff as the reactive net.
 
+**Re-rendering**
+- `export --force` re-exports every conversation even if cached and unchanged, so the whole archive can be re-rendered after a formatting/feature change without `cache --clear`. Combines with `--max-conversations` to spread the work across runs.
+- `mark_exported` now preserves `joplin_note_id` / `joplin_synced_at` / `joplin_resources` across re-exports (refreshing `exported_at`), so a re-export followed by `joplin` updates the existing notes instead of creating duplicates.
+
 **Archive hygiene**
 - `prune` deletes export files not referenced by the manifest (old-layout trees, no-ID orphans), with listing, confirmation, `--dry-run`, `-y`, and empty-directory sweep. Refuses to run when the manifest references no files (so `cache --clear` + `prune` can't wipe the archive). First live run removed 420 stale files (9.4 MB).
 - `doctor` verifies manifest ↔ disk integrity: every recorded `file_path` must exist on disk.