Add catalog EN/AR translations with AI translate-all by locale.

Store product/category translations in entity_translations, expose CMS APIs, and gate the MultiLanguage Data module for businesses.

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/080_entity_translations.sql

@@ -0,0 +1,51 @@
+-- AI / manual catalog translations (EN, AR) for products and categories.
+-- Source text stays on the entity; extra locales live here, one row per entity + locale.
+
+DO $$ BEGIN
+  CREATE TYPE translation_entity_type AS ENUM ('product', 'category');
+EXCEPTION
+  WHEN duplicate_object THEN NULL;
+END $$;
+
+DO $$ BEGIN
+  CREATE TYPE translation_locale AS ENUM ('en', 'ar');
+EXCEPTION
+  WHEN duplicate_object THEN NULL;
+END $$;
+
+DO $$ BEGIN
+  CREATE TYPE translation_status AS ENUM ('pending', 'ready', 'stale', 'failed');
+EXCEPTION
+  WHEN duplicate_object THEN NULL;
+END $$;
+
+CREATE TABLE IF NOT EXISTS entity_translations (
+  id            BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  business_id   BIGINT NOT NULL,
+  entity_type   translation_entity_type NOT NULL,
+  entity_id     BIGINT NOT NULL,
+  locale        translation_locale NOT NULL,
+  fields        JSONB NOT NULL DEFAULT '{}'::jsonb,
+  source_hash   VARCHAR(64) NOT NULL,
+  status        translation_status NOT NULL DEFAULT 'pending',
+  generated_by  VARCHAR(16) NOT NULL DEFAULT 'ai',
+  created_at    TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at    TIMESTAMPTZ NOT NULL DEFAULT now(),
+
+  CONSTRAINT entity_translations_business_id_fkey
+    FOREIGN KEY (business_id) REFERENCES businesses (id) ON DELETE CASCADE,
+  CONSTRAINT entity_translations_entity_locale_unique
+    UNIQUE (entity_type, entity_id, locale)
+);
+
+CREATE INDEX IF NOT EXISTS idx_entity_translations_business_id
+  ON entity_translations (business_id);
+
+CREATE INDEX IF NOT EXISTS idx_entity_translations_entity
+  ON entity_translations (entity_type, entity_id);
+
+DROP TRIGGER IF EXISTS entity_translations_set_updated_at ON entity_translations;
+CREATE TRIGGER entity_translations_set_updated_at
+  BEFORE UPDATE ON entity_translations
+  FOR EACH ROW
+  EXECUTE FUNCTION set_updated_at();