fix(web-outgoing): handle invalid response header characters

[pi0]

Summary

• Wrap res.setHeader() in writeHeaders middleware with a try/catch to gracefully skip headers containing invalid characters (e.g. control chars like \u0001)
• Prevents proxy crash with ERR_INVALID_CHAR when upstream servers return malformed headers
• Adds regression test that simulates Node.js header validation behavior

Upstream ref: http-party/node-http-proxy#1395

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: a859badd-6bf4-45a9-9816-39bb7eef198c

📥 Commits

Reviewing files that changed from the base of the PR and between 8724245 and 9762874.

📒 Files selected for processing (2)

• src/middleware/web-outgoing.ts
• test/middleware/web-outgoing.test.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/invalid-response-headers

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.15%. Comparing base (8724245) to head (9762874).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #106   +/-   ##
=======================================
  Coverage   96.14%   96.15%           
=======================================
  Files           8        8           
  Lines         623      624    +1     
  Branches      233      233           
=======================================
+ Hits          599      600    +1     
  Misses         24       24           

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