feat(db): add growing_enabled column to recorders (migration 014)

services/mam-api/src/db/migrations/014-add-recorder-growing-enabled.sql

@@ -0,0 +1,7 @@
+-- Migration 014: Per-recorder growing_enabled override
+-- Adds a nullable boolean to the recorders table so each recorder can
+-- independently override the global growing_enabled setting. NULL means
+-- "use global"; TRUE/FALSE means "force on/off for this recorder".
+
+ALTER TABLE recorders
+  ADD COLUMN IF NOT EXISTS growing_enabled BOOLEAN DEFAULT NULL;