v1.1.1

Fixes 10 findings from a post-merge review of the if_version/operation_id
work in 1.1.0.

• every mutation (set, rollback, delete) is a single Lua EVAL sharing one
  set of index and snapshot helpers; no JS-side index or snapshot writers
• memrev and memver now share a TTL entry's lifetime: they expire with it,
  and persist together when the TTL is removed. Delete still persists both,
  so the tombstone and the ABA counter outlive any expiry.
• reusing an operation_id for a different memory id returns
  operation_id_mismatch instead of silently replaying the other result
• memory_get surfaces read errors instead of reporting revision 0 from a
  failed read
• replayed writes carry the soft-cap warning
• tags validated: non-empty, no commas, which the CSV wire format cannot
  represent

Verified on the merged tree: 44 tests passing, lint clean.