v1.2.1

What's new in v1.2.1

New: search_factorio_prototypes — exact Factorio prototype values

A sixth store, prototypes_lancedb, holding one structured record per vanilla
Factorio prototype with exact numerical values: recipe ingredients & crafting
times, assembler speeds & energy, technology research costs, item stack sizes,
quality-tier bonuses, and Space Age planet/surface conditions.

• Built from Factorio's own factorio --dump-data export (the fully-resolved
  data.raw) — vanilla 2.1.8 baseline (base + Space Age DLC).
• Filter by prototype_type (umbrella item/entity expand to their subtypes).
• Shipped in the release zip, so it works out of the box for auto-download
  installs — no local build required.

Hardening

• Doc-drift + clone-ignore test guards so a new store can't ship undocumented.
• Smoke test covers all six stores; eval golden set includes prototypes.

Full changelog: v1.2.0...v1.2.1