Add equity print quote joins

packages/storage/tests/equity-print-joins.test.ts

@@ -0,0 +1,42 @@
+import { describe, expect, it } from "bun:test";
+import {
+  equityPrintJoinsTableDDL,
+  EQUITY_PRINT_JOINS_TABLE,
+  fromEquityPrintJoinRecord,
+  toEquityPrintJoinRecord
+} from "../src/equity-print-joins";
+
+const join = {
+  source_ts: 100,
+  ingest_ts: 120,
+  seq: 1,
+  trace_id: "equityjoin:trace-1",
+  id: "equityjoin:trace-1",
+  print_trace_id: "trace-1",
+  quote_trace_id: "quote-1",
+  features: {
+    underlying_id: "SPY",
+    price: 450.12,
+    size: 200,
+    off_exchange_flag: true,
+    quote_placement: "A"
+  },
+  join_quality: {
+    quote_age_ms: 15
+  }
+};
+
+describe("equity-print-joins storage helpers", () => {
+  it("includes the correct table name in the DDL", () => {
+    const ddl = equityPrintJoinsTableDDL();
+    expect(ddl).toContain(EQUITY_PRINT_JOINS_TABLE);
+    expect(ddl).toContain("CREATE TABLE IF NOT EXISTS");
+  });
+
+  it("round-trips equity print join records", () => {
+    const record = toEquityPrintJoinRecord(join);
+    const restored = fromEquityPrintJoinRecord(record);
+    expect(restored.features).toEqual(join.features);
+    expect(restored.join_quality).toEqual(join.join_quality);
+  });
+});