Fix golangci-lint CI failures in internal/proxy/handler.go

[Copilot]

Two staticcheck violations introduced in internal/proxy/handler.go were causing the lint CI job to fail.

Changes

• Remove forwardGraphQL: Dead code — defined but never called. GraphQL forwarding is handled inline in handleWithDIFC.
• Fix S1034 type switch: Eliminate redundant type assertion inside the map[string]interface{} case by using the idiomatic assigned type switch form:

// Before
switch originalData.(type) {
case map[string]interface{}:
    obj := originalData.(map[string]interface{}) // redundant assertion
    ...
}

// After
switch obj := originalData.(type) {
case map[string]interface{}:
    // obj is already the asserted type
    ...
}

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• example.com
  • Triggering command: /tmp/go-build1696049945/b333/launcher.test /tmp/go-build1696049945/b333/launcher.test -test.testlogfile=/tmp/go-build1696049945/b333/testlog.txt -test.paniconexit0 -test.timeout=10m0s /tmp/go-build1696049945/b238/vet.cfg go o x_amd64/compile (dns block)
• invalid-host-that-does-not-exist-12345.com
  • Triggering command: /tmp/go-build1696049945/b318/config.test /tmp/go-build1696049945/b318/config.test -test.testlogfile=/tmp/go-build1696049945/b318/testlog.txt -test.paniconexit0 -test.timeout=10m0s ncod�� 64/src/runtime/cgo 64/src/encoding/asn1/asn1.go x_amd64/asm (dns block)
• nonexistent.local
  • Triggering command: /tmp/go-build1696049945/b333/launcher.test /tmp/go-build1696049945/b333/launcher.test -test.testlogfile=/tmp/go-build1696049945/b333/testlog.txt -test.paniconexit0 -test.timeout=10m0s /tmp/go-build1696049945/b238/vet.cfg go o x_amd64/compile (dns block)
• slow.example.com
  • Triggering command: /tmp/go-build1696049945/b333/launcher.test /tmp/go-build1696049945/b333/launcher.test -test.testlogfile=/tmp/go-build1696049945/b333/testlog.txt -test.paniconexit0 -test.timeout=10m0s /tmp/go-build1696049945/b238/vet.cfg go o x_amd64/compile (dns block)
• this-host-does-not-exist-12345.com
  • Triggering command: /tmp/go-build1696049945/b342/mcp.test /tmp/go-build1696049945/b342/mcp.test -test.testlogfile=/tmp/go-build1696049945/b342/testlog.txt -test.paniconexit0 -test.timeout=10m0s /tmp/go-build1696049945/b215/vet.cfg p/go-build linux.go x_amd64/compile --exclude-hidden/opt/hostedtoolcache/go/1.25.8/x64/pkg/tool/linux_amd64/vet terpreter --quiet x_amd64/compile 2599�� ache/go/1.25.8/x-errorsas AcPk/Gl1SDLLxjjl-ifaceassert x_amd64/vet (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Fix the failing GitHub Actions workflow lint
Analyze the workflow logs, identify the root cause of the failure, and implement a fix.
Job ID: 67821217215
Job URL: https://github.com/github/gh-aw-mcpg/actions/runs/23317651473/job/67821217215

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[Copilot]

Pull request overview

This PR fixes golangci-lint/staticcheck failures in the proxy handler by removing unused code and making a type switch idiomatic, unblocking the lint CI job for the proxy package.

Changes:

• Removed the unused forwardGraphQL method (confirmed no remaining references in the repo).
• Refactored writeEmptyResponse to use an assigned type switch form, removing the redundant type assertion in the map[string]interface{} case.

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