Stub out packages in the database

sql/branch.sql

@@ -0,0 +1,26 @@
+BEGIN;
+
+    CREATE TABLE package_managers
+    ( id        bigserial       PRIMARY KEY
+    , name      text            NOT NULL UNIQUE
+     );
+
+    CREATE TABLE packages
+    ( id                    bigserial                   PRIMARY KEY
+    , package_manager_id    bigint                      NOT NULL
+    , name                  text                        NOT NULL
+    , description           text                        NOT NULL DEFAULT ''
+    , long_description      text                        NOT NULL DEFAULT ''
+    , long_description_raw  text                        NOT NULL DEFAULT ''
+    , long_description_type text                        NOT NULL DEFAULT ''
+    , mtime                 timestamp with time zone    NOT NULL
+    , UNIQUE (package_manager_id, name)
+     );
+
+    CREATE TABLE package_emails
+    ( package_id    bigint  NOT NULL
+    , email         text    NOT NULL
+    , UNIQUE (package_id, email)
+     )
+
+END;