fix: add default 300 maxAge for http adapter

[jameswragg]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

The README specified the IPX_HTTP_MAX_AGE default to be 300 but its never set (as a default).

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[pi0]

Nice spot!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fc8a0de) 54.10% compared to head (65be210) 54.10%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #197   +/-   ##
=======================================
  Coverage   54.10%   54.10%           
=======================================
  Files          11       11           
  Lines        1083     1083           
  Branches       45       45           
=======================================
  Hits          586      586           
  Misses        497      497           

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[jameswragg]

FYI @pi0 I don't have merge permissions

[pi0]

Yeah will merge once planned for release otherwise will forget about PR :)