refactor(electron): use sqlite to store server clock & sync meta (#6957)

After this PR, IDB should not be used in desktop any longer.

packages/frontend/native/schema/src/lib.rs

@@ -15,5 +15,15 @@ CREATE TABLE IF NOT EXISTS "blobs" (
 CREATE TABLE IF NOT EXISTS "version_info" (
   version NUMBER NOT NULL,
   timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL
+);
+CREATE TABLE IF NOT EXISTS "server_clock" (
+  key TEXT PRIMARY KEY NOT NULL,
+  data BLOB NOT NULL,
+  timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL
+);
+CREATE TABLE IF NOT EXISTS "sync_metadata" (
+  key TEXT PRIMARY KEY NOT NULL,
+  data BLOB NOT NULL,
+  timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL
 )
 "#;