New Claude releases no longer need a hand-maintained SHORT_NAMES entry or
FAST_MULTIPLIERS row. Display names are derived from the claude-<family>-<major>-<minor>
id, and the fast-mode multiplier rides along as a 5th element in the LiteLLM
snapshot tuple (provider_specific_entry.fast). Fixes#420: claude-opus-4-8 gets
its own line and correct pricing instead of falling into the Opus 4 bucket.