fix: Audit fixes round 2

[mtsitrin]

Description

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Closes #XXX

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow-up issues.

PR review checkboxes:

I have...

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Targeted PR against the correct branch
• included the correct type prefix in the PR title
• Linked to the GitHub issue with discussion and accepted design
• Targets only one GitHub issue
• Wrote unit and integration tests
• Wrote relevant migration scripts if necessary
• All CI checks have passed
• Added relevant godoc comments

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For Reviewer:

• Confirmed the correct type prefix in the PR title
• Reviewers assigned
• Confirmed all author checklist items have been addressed

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After reviewer approval:

• In case the PR targets the main branch, PR should not be squash merge in order to keep meaningful git history.
• In case the PR targets a release branch, PR must be rebased.

[codecov]

Codecov Report

Attention: 26 lines in your changes are missing coverage. Please review.

Comparison is base (bb59edf) 30.80% compared to head (001fe5c) 30.87%.

Files	Patch %	Lines
app/ante/reject_msgs.go	50.00%	11 Missing and 2 partials ⚠️
app/ante/handlers.go	20.00%	12 Missing ⚠️
app/healthcheck.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #511      +/-   ##
==========================================
+ Coverage   30.80%   30.87%   +0.06%     
==========================================
  Files         166      166              
  Lines       25340    25383      +43     
==========================================
+ Hits         7806     7836      +30     
- Misses      16288    16299      +11     
- Partials     1246     1248       +2     

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