Add queue tables, quote SQL identifiers (v1.3.0)

- isQueue table option adds queue columns and a (status, available_at)
  index; BunSQLite.queue exposes add, claim, complete, fail and
  release_stale with atomic claims
- Set busy_timeout on connections so workers in separate processes wait
  instead of failing with SQLITE_BUSY
- Quote table and column names with backticks in generated SQL, so
  reserved words (to, order, group) work and unknown columns error
  instead of matching as string literals
- Tests for queue ops, multi-process claims and reserved-word names

Co-Authored-By: Claude Opus 5.5 <[email protected]>

dist/functions/grab-sqlite-client.js

@@ -13,6 +13,9 @@ export default function grabSQLiteClient({ config }) {
         create: true,
     });
     sqliteVec.load(SQLiteClient);
+    // Wait for other connections' write locks instead of failing with
+    // SQLITE_BUSY (queue workers in separate processes)
+    SQLiteClient.run("PRAGMA busy_timeout = 5000;");
     if (config.wal_mode) {
         SQLiteClient.run("PRAGMA journal_mode = WAL;");
     }