[ 0.14.14 ] Migrate to bytes, support signatures

1. Set static lines number a2637706
2. Dump request to Coveralls a5445cf7
3. Add Raku version anchor 9e7ac229
4. Reorg embedded pages 1d2ec098
5. Fix embedded user unit test 99c37c9f
6. Compress embedded content with Bzip2 77258b48
7. Update page conversion script dd9bbc20
8. Fetch compression flag before select a901b8a9
9. Fix compression flag 85681b4d
10. Support multiple compression algorithms f62940a2
11. Support signatures 845b519c
12. Prepare stubs to store signatures 6d15cd8c
13. Use v0.6.2 smart contract on Sepolia 98af4e26
14. Support deprecated string content f33568c2
15. Migrate to bytes, support signatures ffa03bba