Spec drift: myriad — trading_model filter parameter missing from /markets and portfolio endpoints

[realfishsam]

Summary

Myriad's API supports a trading_model query parameter on the GET /markets endpoint and user portfolio endpoints to filter markets by their trading model (e.g. CLOB, AMM). This parameter is not present in core/specs/myriad.yaml.

Impact

LOW — PMXT cannot filter Myriad markets by trading model via the spec. Users will receive all market types mixed together with no server-side filtering available through PMXT.

Details

• Parameter: trading_model (string enum: "CLOB" | "AMM")
• Present on: GET /markets and GET /portfolio/markets (and possibly GET /portfolio/positions)
• Spec file: core/specs/myriad.yaml

Required Fix

Add trading_model as an optional query parameter to the relevant endpoint definitions in core/specs/myriad.yaml.