Preparar repositorio para despliegue: código fuente limpio

init-db/13-entity-images.sql

@@ -0,0 +1,8 @@
+CREATE TABLE IF NOT EXISTS entity_images (
+    id SERIAL PRIMARY KEY,
+    entity_name TEXT UNIQUE NOT NULL,
+    image_url TEXT,
+    summary TEXT,
+    source TEXT DEFAULT 'wikipedia',
+    last_checked TIMESTAMP WITH TIME ZONE DEFAULT NOW()
+);