refactor(stm): harden legacy decoders and key registration

[damrobi]

Content

This PR includes some updates of legacy decoders and of the key registration. The updates harden the robustness of the decoders and of the key registration.

Pre-submit checklist

• Branch
  • Tests are provided (if possible)
  • Crates versions are updated (if relevant)
  • CHANGELOG file is updated (if relevant)
  • Commit sequence broadly makes sense
  • Key commits have useful messages
• PR
  • All check jobs of the CI have succeeded
  • Self-reviewed the diff
  • Useful pull request description
  • Reviewer requested

Comments

Issue(s)

[github-actions]

Test Results

     5 files  ± 0     209 suites  ±0   33m 52s ⏱️ - 2h 41m 39s
 3 314 tests  - 72   3 314 ✅  - 72  0 💤 ±0  0 ❌ ±0 
11 049 runs   - 72  11 049 ✅  - 72  0 💤 ±0  0 ❌ ±0 

Results for commit 005d085. ± Comparison against base commit 936eadd.

♻️ This comment has been updated with latest results.