[WIP] Fix failing GitHub Actions workflow lint

[Copilot]

Fix for GitHub Actions Workflow Lint Failure

Problem: Job #62826533146 failed because internal/difc/agent.go has a gofmt formatting issue

Root Cause:

• Line 145 in internal/difc/agent.go has trailing whitespace on a blank line
• Introduced in commit 51d0a40 which added debug logging to the DIFC agent module
• Caused PR Extract duplicate HTTP connection error detection into helper function #777 lint check to fail when merging with main branch

Fix Applied:

• Identified the formatting issue (trailing whitespace on line 145)
• Applied gofmt -w to fix the formatting
• Verified fix with make lint - PASSED ✅
• Committed the fix to branch copilot/fix-difc-agent-formatting

Impact: This fix will allow PR #777 and other PRs to pass the lint check when merging with main.

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: 62826533146
Job URL: https://github.com/github/gh-aw-mcpg/actions/runs/21773846074/job/62826533146

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