- Bump core package version to 0.10.3
- Rename web package to "malachite-web-frontend"
- Bump web package version to 0.3.2

Prefer CAR export (com.atproto.sync.getRepo) for deduplication since it uses a
separate, more generous rate-limit bucket and avoids write-quota costs. If the
CAR sync check fails (network/auth/PDS unsupported), fall back gracefully by
skipping deduplication and allowing applyWrites to handle existing records.

The PDS rejects creates for already-existing rkeys while still accepting new
records, ensuring imports continue without aborting. Added logging and
conditional sync stats to reflect whether CAR-based deduplication succeeded.

Applied to both CLI and web import flows.