pub fn parse_trd_market(raw: &str) -> Option<TrdMarket>Expand description
Parse a user-facing trade market string into the canonical OpenAPI
Trd_Common.TrdMarket enum.
Keep this in futu-trd so CLI, MCP read handlers, and MCP write handlers do
not drift when OpenAPI adds a market variant. The parser intentionally
accepts both labels and official enum integers.