feat(confluence): add racks, evaluations, and signal-history schema + repository (M22 slice 3)

app/server/src/db/client.ts

@@ -212,6 +212,48 @@ function runMigrations(db: DatabaseSync): void {
       sent_at     TEXT
     )`,
     `CREATE INDEX IF NOT EXISTS idx_notification_outbox_pending ON notification_outbox(status, created_at)`,
+    // Confluence Signal Engine (M22) — racks, evaluations, signal history.
+    `CREATE TABLE IF NOT EXISTS confluence_racks (
+      id               TEXT PRIMARY KEY,
+      owner_id         TEXT,
+      name             TEXT NOT NULL,
+      slot_ids_json    TEXT NOT NULL,
+      description      TEXT,
+      is_system        INTEGER NOT NULL DEFAULT 0,
+      created_at       TEXT NOT NULL
+    )`,
+    `CREATE INDEX IF NOT EXISTS idx_confluence_racks_owner ON confluence_racks(owner_id)`,
+    `CREATE TABLE IF NOT EXISTS confluence_evaluations (
+      id               TEXT PRIMARY KEY,
+      symbol           TEXT NOT NULL,
+      as_of            TEXT NOT NULL,
+      rack_id          TEXT NOT NULL REFERENCES confluence_racks(id) ON DELETE CASCADE,
+      assessments_json TEXT NOT NULL,
+      bull_evidence    REAL NOT NULL,
+      bear_evidence    REAL NOT NULL,
+      bull_count       INTEGER NOT NULL,
+      bear_count       INTEGER NOT NULL,
+      assessed_count   INTEGER NOT NULL,
+      net_evidence     REAL NOT NULL,
+      total_evidence   REAL NOT NULL,
+      quality          TEXT NOT NULL,
+      created_at       TEXT NOT NULL,
+      UNIQUE(symbol, as_of, rack_id)
+    )`,
+    `CREATE INDEX IF NOT EXISTS idx_confluence_evals_symbol_asof ON confluence_evaluations(symbol, as_of DESC)`,
+    `CREATE TABLE IF NOT EXISTS confluence_signal_history (
+      id              TEXT PRIMARY KEY,
+      symbol          TEXT NOT NULL,
+      slot_id         TEXT NOT NULL,
+      rack_id         TEXT NOT NULL REFERENCES confluence_racks(id) ON DELETE CASCADE,
+      fired_at        TEXT NOT NULL,
+      quality_at_fire TEXT NOT NULL,
+      price_resolved  INTEGER NOT NULL DEFAULT 0,
+      price_confirmed INTEGER NOT NULL DEFAULT 0,
+      resolved_at     TEXT,
+      verdict         TEXT
+    )`,
+    `CREATE INDEX IF NOT EXISTS idx_confluence_signal_symbol_slot ON confluence_signal_history(symbol, slot_id)`,
   ];
   for (const sql of migrations) {
     try { db.exec(sql); } catch { /* column already exists */ }