Add the checkpoints schema for diesel

migrations/2019-11-16-231854_create_checkpoints/down.sql

@@ -0,0 +1,2 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE checkpoints;

migrations/2019-11-16-231854_create_checkpoints/up.sql

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+CREATE TABLE checkpoints (
+    id INTEGER PRIMARY KEY,
+    filepath VARCHAR NOT NULL,
+    filesize INTEGER NOT NULL,
+    inode INTEGER NOT NULL,
+    offset_bytes INTEGER NOT NULL DEFAULT 0
+)