DSL Sketch: Core Primitives for DeltaForge MVP

- Asset
  - Canonical representation of tradable instruments.
  - Fields: type (equity, option, future), symbol/underlying, strike, expires
  - Methods: canonical_id() for stable identifiers

- MarketSignal
  - Encapsulates observable market data used by adapters to produce StrategyDelta inputs.
  - Fields: asset (Asset), price, volatility, liquidity, timestamp

- StrategyDelta
  - Local hedge/trade intent for an asset; acts as a primitive building block for plans.
  - Fields: asset, delta, vega, gamma, target_pnl, max_order_size, timestamp

- PlanDelta
  - Incremental set of StrategyDelta decisions for one or more venues.
  - Fields: deltas (List[StrategyDelta]), confidence, venue, author, timestamp, signature

- LocalProblem (concept, not yet implemented)
- SharedVariables (concept, not yet implemented)
- DualVariables (concept, not yet implemented)
- AuditLog (concept, not yet implemented)

Notes
- The MVP uses a lightweight, in-process coordination between two venues. The DSL above is:
  a) lightweight, self-describing, and easily serializable; b) designed so adapters can plug into it without deep coupling.
- This document is a living sketch; future iterations may formalize validation, schemas, and a small encoder/decoder for wire transport.