fetch|gen bestiary subcommands vendor data/open5e/monsters.json (322
SRD monsters) and generate bestiary_srd_data.go — all 322 as raw SRD
stat blocks (HP/AC/ability scores/CR + per-attack damage dice).
This is a balance-baseline reference, not an engine roster: raw SRD
damage one-shots the solo player, so nothing here feeds combat. It's
what the future tuning pass reads against when deriving dndBestiary /
srdProfiles entries. XP is derived from CR (Open5e has no XP field).
