Configure run/repair db migrations

Refs: #1517

modules/joex/src/main/resources/reference.conf

@@ -55,6 +55,20 @@ docspell.joex {
     password = ""
   }
 
+  # Additional settings related to schema migration.
+  database-schema = {
+    # Whether to run main database migrations.
+    run-main-migrations = true
+
+    # Whether to run the fixup migrations.
+    run-fixup-migrations = true
+
+    # Use with care. This repairs all migrations in the database by
+    # updating their checksums and removing failed migrations. Good
+    # for testing, not recommended for normal operation.
+    repair-schema = false
+  }
+
   # Enable or disable debugging for e-mail related functionality. This
   # applies to both sending and receiving mails. For security reasons
   # logging is not very extensive on authentication failures. Setting