88ede807c4
deepseek-v4-pro has been routable since v0.12 but was missing from the _OFFICIAL_DOCS_PRICING table. Sessions using this model showed as "unknown cost" in hermes insights instead of a dollar estimate. Add pricing entry using published list prices: - input: \$1.74/M tokens - output: \$3.48/M tokens - cache_read: \$0.0145/M tokens Uses standard list rates (not the 75% promo) so estimates remain accurate after promo expires 2026-05-31. Closes #24218