fix(vaults): enable WAL on SQLite vault to fix concurrent locks

.gitignore

@@ -13,6 +13,9 @@ update_check.json
 *.pem
 *.bin
 *.db
+*.db-shm
+*.db-wal
+*.db-journal
 *.ttf
 *.otf
 device_cert

unshackle/vaults/SQLite.py

@@ -208,7 +208,11 @@ class ConnectionFactory:
         self._store = threading.local()
 
     def _create_connection(self) -> Connection:
-        return sqlite3.connect(self._path)
+        conn = sqlite3.connect(self._path, timeout=30.0)
+        conn.execute("PRAGMA journal_mode=WAL")
+        conn.execute("PRAGMA synchronous=NORMAL")
+        conn.execute("PRAGMA busy_timeout=30000")
+        return conn
 
     def get(self) -> Connection:
         if not hasattr(self._store, "conn"):