Brummel
cc0dce19a3
The broker milestone's (C10 A-side) foundation: two pure value-type deliverables, no broker and no derivation yet. - #113: extend InstrumentSpec with deploy-grade fields (instrument_id, contract_size, pip_value_per_lot, min_lot, lot_step, quote_currency) + populate the vetted table for the five instruments; refuse-don't-guess arm stays. Permanent authored floor of the override hierarchy (#124). - #114: PositionAction { Buy, Sell, Close } (closed enum, serde-encoded as i64) + PositionEvent row in aura-engine, faithful to the C10 column spec (no open_ts, unsigned volume, direction is the action). Signed under /boss on a grounding-check PASS (all current-state assumptions ratified by green tests; the two new types are greenfield, expected). Derived fork decisions (quote_currency &'static str; action enum encoded as i64 0/1/2; stable instrument_id + overridable vetted values) recorded on #113. refs #113 #114