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Data Model: Pricing Awareness and Market Data Streaming

Scope​

State 008 extends functional behavior with pricing-aware fields and valuation calculations.

Entity Impact​

  • Added:
    • Trade price capture at execution/settlement time.
    • Position valuation fields (market value, cost basis, P&L projections).
    • Price quote freshness field (asOf) on snapshot and stream payloads for deterministic client-side ordering.
  • Changed:
    • Position aggregation logic includes price-aware computation outputs.
    • UI bootstrap flow combines snapshot seed + stream continuation using max(asOf) merge semantics per ticker.
  • Removed: none

Notes​

This state introduces additive functional data for valuation while retaining compatibility with existing account/trade/position workflow boundaries.