RodexDB v0.3.0

Added

• POST /v1/batch/get — up to 50 keys in one call; missing keys are
  listed, not errors; N keys = N reads (weighted, reserved first); strong
  for consistent reads.
• POST /v1/item/increment — atomic counters (DynamoDB ADD): one write,
  zero reads, race-free; auto-creates the row; negative by decrements.
• Row TTL — optional ttl (unix seconds) on put/batch items; rows expire
  and DynamoDB deletes them for free (~48 h lag); the gateway filters expired
  rows on every read path so clients never see them.
• MCP batch_get_item (read, ungated) + increment_item (mutation,
  confirmation-gated) — 24 tools total.

Changed

• put / batch/put echo ttl; counter rows read back with counter.
• Docs + Python client updated (get_many, increment, ttl).

Tests

• 170 → 182 (batch/get weight proof, increment atomicity + budget, TTL
  expiry across get/query/batch-get, MCP trio tools).