ci: only fail fuzzing on crashes/timeouts/OOM, not leaks

[anky98ai]

Description

Brief summary of the changes in this PR.

Related Issue

Fixes #(issue number)

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Performance improvement
• Code refactoring
• Test addition or update

Changes Made

• Change 1
• Change 2
• Change 3

Testing Performed

Describe the tests you ran to verify your changes:

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• All existing tests pass (cargo test)

Test commands:

cargo test
cargo bench  # if performance-related

Checklist

Before submitting this PR, please ensure:

• Code follows project style guidelines (cargo fmt)
• No clippy warnings (cargo clippy -- -D warnings)
• All tests pass (cargo test)
• Documentation updated (if applicable)
• CHANGELOG.md updated (if applicable)
• No breaking changes (or documented if necessary)
• Commit messages follow conventional commit format

Performance Impact

If this PR affects performance:

• Benchmarks run and results documented
• No significant performance regression
• Performance improvement quantified

Benchmark results:

# Paste benchmark output here if applicable

Screenshots/Examples

If applicable, add screenshots or example output to demonstrate the changes.

Additional Notes

Any additional information that reviewers should know.

Breaking Changes

If this PR introduces breaking changes, describe them here and provide migration instructions.

[berisher]

lgtm!