Replace s3s::dto::{RestoreStatus, Timestamp} in filemeta with a
filemeta-owned RestoreStatus (same field names, OffsetDateTime expiry).
RestoreStatusOps and parse_restore_obj_status keep their signatures and
persisted rendering; the ecstore restore finalize / lifecycle restore
writers and rustfs RestoreObject now build the filemeta type.
- crates/filemeta: drop s3s; tokio "time" becomes a dev-dependency
(the metacache tests got it through s3s feature unification).
- metadata_keys: drop the s3s half of the historical-source cross-check;
PINNED, the pre-A3a fixture and per-character mutation still pin keys.
- new test re-renders the pre-A3a fixture restore value byte-for-byte.
- s3s footprint baselines 210 -> 209 files, ecstore 37 -> 36.
Refs rustfs/backlog#1735
Chris
2fc3494efb