v0.54.1 — fix(search): flat $0.08 per call — reserve, description and skills

Fixed — blockrun_search is one flat price, and the tool said otherwise

The gateway repriced /v1/search to a flat $0.08 per call on 2026-09-29
(blockrun SEARCH_PRICE_PER_CALL_USD: xAI never sees max_results, so the
count never drove cost). This server kept reserving and advertising
$0.025 × max_results: the default call reserved $0.2645 against a $0.081
charge (3×), a 50-source call $1.3145 (16×), and the description told every
agent search was "expensive by default" and to ask for fewer sources.

Live 402 quotes, 2026-10-06: Base amount 81000 and Solana 80000 at
max_results 1, 10 and 50 alike. The reserve is now withTxFee($0.08) =
$0.082 at any size, never below the charge; test/search-cost.test.ts pins
it flat. Tool description, skills/search, skills/blockrun, skills/surf
and the README price row now say $0.08 flat; the full/research schema-token
rows moved with the shorter description (14,018 / 2,727).