fix(web-outgoing): handle object target in redirect host rewrite

[pi0]

Summary

• Fix crash when options.target is a ProxyTargetDetailed object (not a string or URL) and the setRedirectHostRewrite middleware runs on a redirect response
• The new URL() constructor was called with a plain object, which throws Invalid URL; now constructs the URL from the object's protocol, host/hostname, and port properties
• Add regression tests for both object and URL instance targets

Upstream: http-party/node-http-proxy#1600

Test plan

• Regression test: setRedirectHostRewrite with ProxyTargetDetailed object target
• Existing test: setRedirectHostRewrite with URL instance target
• Full test suite passes (230 tests)

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: c4ef4ca6-c361-495a-b9ce-098045215d54

📥 Commits

Reviewing files that changed from the base of the PR and between 8724245 and 8b2b8ea.

📒 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/target-object-crash

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.20%. Comparing base (8724245) to head (8b2b8ea).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #108      +/-   ##
==========================================
+ Coverage   96.14%   96.20%   +0.05%     
==========================================
  Files           8        8              
  Lines         623      632       +9     
  Branches      233      237       +4     
==========================================
+ Hits          599      608       +9     
  Misses         24       24              

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