feat: tcin is the primary key now

etl/main.py

@@ -46,7 +46,7 @@ def main():
                 password=opts.pg_password,
                 database=opts.pg_database,
                 table=opts.pg_table,
-                table_key="gtin13",
+                table_key="tcin",
             ))
         # fmt: on
 

sql/products_schema.sql

@@ -1,6 +1,6 @@
 CREATE TABLE IF NOT EXISTS {{ params.output_table }} (
-    gtin13           VARCHAR PRIMARY KEY,
-    tcin             VARCHAR NOT NULL,
+    tcin             VARCHAR PRIMARY KEY,
+    gtin13           VARCHAR NOT NULL,
     primary_category VARCHAR NOT NULL,
     materials        VARCHAR[],
     packaging        INT     NOT NULL,