Potential fix for code scanning alert no. 54: Incorrect conversion between integer types

[marle3003]

Potential fix for https://github.com/marle3003/mokapi/security/code-scanning/54

To fix the problem:

• Replace any use of strconv.Atoi (which returns an architecture-dependent int) with strconv.ParseInt specifying the expected bit size, such as 32 for int32, and use this bit size in all relevant conversions.
• Ensure that wherever conversion to a smaller integer type such as int32 is performed, the parsing and/or conversion step is constrained so that overflow can not occur, either by parsing directly to a bounded type, or by explicit bounds checks before conversion.
• In providers/openapi/schema/parse_xml.go at line 170, replace strconv.Atoi(s) with strconv.ParseInt(s, 10, 32) so that large out-of-range values will fail, and return an int32.
• In schema/json/parser/parser_integer.go, for case "int32", replace strconv.Atoi(v) with strconv.ParseInt(v, 10, 32) and use its result. This will ensure the parsed value will not exceed the int32 range.

No additional packages or external dependencies are needed, just changes to use strconv.ParseInt and direct conversion to int32 from its result.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.86%. Comparing base (cf32e10) to head (5bfbeb7).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #780      +/-   ##
==========================================
- Coverage   70.86%   70.86%   -0.01%     
==========================================
  Files         457      457              
  Lines       41293    41293              
==========================================
- Hits        29264    29262       -2     
- Misses       9865     9866       +1     
- Partials     2164     2165       +1     

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