feat: F023 signal-to-match pipeline & shadow market decision flow

src/provider/ISignalPipelineProvider.ts

@@ -0,0 +1,8 @@
+import type { PipelineState, AuditTrailEntry, GateType } from '../domain/signalPipeline'
+
+export interface ISignalPipelineProvider {
+  getPipelineState(signalId: string): Promise<PipelineState | null>
+  evaluateGate(signalId: string, gateType: GateType): Promise<PipelineState>
+  getAuditTrail(signalId: string): Promise<AuditTrailEntry[]>
+  publishToFutureAvailability(signalId: string): Promise<PipelineState>
+}