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]>

tests/sql-values.test.ts

@@ -27,7 +27,7 @@ describe("sqlInsertGenerator", () => {
             ],
         });
         expect(res?.query).toBe(
-            "INSERT INTO items (name,active,qty,note) VALUES (?,?,?,?),(?,?,?,?)",
+            "INSERT INTO `items` (`name`,`active`,`qty`,`note`) VALUES (?,?,?,?),(?,?,?,?)",
         );
         expect(res?.values).toEqual(["a", 0, 0, null, "b", null, null, ""]);
     });
@@ -46,7 +46,7 @@ describe("sqlInsertGenerator", () => {
             ],
         });
         expect(calls).toBe(1);
-        expect(res?.query).toBe("INSERT INTO items (emb) VALUES (vec_f32(?))");
+        expect(res?.query).toBe("INSERT INTO `items` (`emb`) VALUES (vec_f32(?))");
         expect(res?.values).toEqual(["[1,2]"]);
     });