feat: seed default risk_configs with macro and competitive layers enabled

infra/migrations/032_seed_default_risk_config.sql

@@ -0,0 +1,12 @@
+-- Seed a default risk_configs row with all signal layers explicitly enabled.
+-- This ensures fresh deployments have macro and competitive layers active
+-- without requiring manual API calls or DB patches.
+-- Idempotent: skips if an active config already exists.
+
+INSERT INTO risk_configs (name, trading_mode, config, active)
+SELECT 'default', 'paper',
+       '{"macro_enabled": true, "competitive_enabled": true}'::jsonb,
+       TRUE
+WHERE NOT EXISTS (
+    SELECT 1 FROM risk_configs WHERE active = TRUE
+);