chore(solana): handle action items vol 4

[mariuszzak]

Description

This PR addresses the issues we discovered during the code walk-through session.

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Linked to GitHub issue with discussion and accepted design, OR link to spec that describes this work.
• Wrote unit and integration tests.
• Added relevant natspec and godoc comments.
• Provide a conventional commit message to follow the repository standards.
• Re-reviewed Files changed in the GitHub PR explorer.
• Review SonarCloud Report in the comment section below once CI passes.

[codecov]

Codecov Report

❌ Patch coverage is 62.69531% with 191 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.03%. Comparing base (9047769) to head (dbee3da).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ms/solana/packages/solana-ibc-types/src/ibc_app.rs	0.00%	97 Missing ⚠️
...ograms/ics26-router/src/instructions/ack_packet.rs	0.00%	18 Missing ⚠️
...grams/ics26-router/src/instructions/recv_packet.rs	0.00%	17 Missing ⚠️
...ms/ics26-router/src/instructions/timeout_packet.rs	0.00%	17 Missing ⚠️
...access-manager/src/instructions/upgrade_program.rs	50.00%	11 Missing ⚠️
...rograms/solana/programs/ics26-router/src/events.rs	0.00%	8 Missing ⚠️
...rams/solana/packages/solana-ibc-types/src/ics27.rs	91.80%	5 Missing ⚠️
...grams/ics27-gmp/src/instructions/on_recv_packet.rs	0.00%	4 Missing ⚠️
...ograms/solana/packages/solana-ibc-types/src/cpi.rs	0.00%	2 Missing ⚠️
...cs26-router/src/instructions/set_access_manager.rs	0.00%	2 Missing ⚠️
... and 10 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #857      +/-   ##
==========================================
+ Coverage   72.88%   73.03%   +0.14%     
==========================================
  Files         109      110       +1     
  Lines       15260    15359      +99     
==========================================
+ Hits        11123    11217      +94     
- Misses       4137     4142       +5     

Flag	Coverage Δ
solana	70.99% <62.69%> (+0.16%)	⬆️

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[cernicc]

Added some comments

[srdtrk]

Lgtm in general. Left some improvement suggestions

[srdtrk]

Lgtm. Just left a question which you may wanna address before merging