feat(db): Ensure no duplicate data in the DB

migrations/2021-03-02-022949_create_game_file_table/up.sql

@@ -1,8 +1,8 @@
 -- Your SQL goes here
 CREATE TABLE game_file (
     id INTEGER PRIMARY KEY NOT NULL,
-    original_path TEXT NOT NULL, -- TEXT assumes a Unicode Encoding
-    file_hash BLOB NOT NULL,
+    original_path TEXT NOT NULL UNIQUE, -- TEXT assumes a Unicode Encoding
+    file_hash BLOB NOT NULL UNIQUE,
     game_save_id INTEGER NOT NULL,
     FOREIGN KEY (game_save_id) REFERENCES game_save_location (id)
 )

migrations/2021-03-02-025744_create_game_save_loc_table/up.sql

@@ -1,7 +1,7 @@
 -- Your SQL goes here
 CREATE TABLE game_save_location (
     id INTEGER PRIMARY KEY NOT NULL,
-    friendly_name TEXT, -- This can be null
-    original_path TEXT NOT NULL,
-    uuid BLOB NOT NULL
+    friendly_name TEXT UNIQUE, -- This can be null
+    original_path TEXT NOT NULL UNIQUE,
+    uuid BLOB NOT NULL UNIQUE
 )