fix db migration

Cargo.lock

@@ -427,7 +427,7 @@ dependencies = [
 
 [[package]]
 name = "datatrash"
-version = "1.1.5"
+version = "1.1.7"
 dependencies = [
  "actix-files",
  "actix-governor",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "datatrash"
-version = "1.1.6"
+version = "1.1.7"
 authors = ["neri"]
 edition = "2021"
 

init-db.sql

@@ -10,5 +10,7 @@ CREATE TABLE IF NOT EXISTS files (
 ALTER TABLE files ADD COLUMN IF NOT EXISTS delete_on_download boolean;
 ALTER TABLE files ALTER COLUMN delete_on_download set not null;
 ALTER TABLE files ALTER COLUMN valid_till TYPE timestamptz;
+ALTER TABLE files ADD COLUMN IF NOT EXISTS content_type varchar(255) not null
+    GENERATED ALWAYS AS (CASE WHEN kind = 'text' THEN 'text/plain' ELSE 'application/octet-stream' END) STORED;
+ALTER TABLE files ALTER COLUMN content_type DROP EXPRESSION IF EXISTS;
 ALTER TABLE files DROP COLUMN IF EXISTS kind;
-ALTER TABLE files ADD COLUMN IF NOT EXISTS content_type varchar(255);