feat: add housekeeper task interceptor trigger and update docs

postgresql/procedures/01_maintenance.sql

@@ -226,3 +226,14 @@ BEGIN
     END LOOP;
 END;
 $$;
+
+-- Trigger function to silently discard housekeeper tasks for partitioned tables
+CREATE OR REPLACE FUNCTION partitions.housekeeper_insert_trigger()
+RETURNS TRIGGER AS $$
+BEGIN
+    IF EXISTS (SELECT 1 FROM partitions.config WHERE table_name = NEW.tablename) THEN
+        RETURN NULL;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;