[Fix] Fix infinite loop and OOB read in archive processing

[Fix] Fix infinite loop and OOB read in archive processing

- RAR v5 extra area parsing: fix wrong loop boundary (used advanced `p`
  instead of `ex + extra_sz`), wrong advancement (`cur_sz` alone didn't
  account for the size vint bytes), and wrong remain calculation for the
  second vint read. Add bounds validation for `cur_sz`.
- 7zip codec ID: validate `p + sz <= end` before reading codec ID bytes
  to prevent out-of-bounds read with malformed archives.