Fix staticcheck QF1003 and stabilize incremental lint fallback

[Copilot]

CI lint failures from staticcheck QF1003 (loop variable reassignment) in pkg/campaign/interactive.go:294 and incremental lint failures when origin/main ref unavailable in PR workflows.

Changes

Fix loop variable reassignment

• Replace owner reassignment with trimmedOwner variable to eliminate QF1003 warning

// Before
for _, owner := range owners {
    owner = strings.TrimSpace(owner)  // QF1003: reassigning loop var
    if !strings.HasPrefix(owner, "@") {
        owner = "@" + owner
    }
    config.Owners = append(config.Owners, owner)
}

// After  
for _, owner := range owners {
    trimmedOwner := strings.TrimSpace(owner)
    if !strings.HasPrefix(trimmedOwner, "@") {
        trimmedOwner = "@" + trimmedOwner
    }
    config.Owners = append(config.Owners, trimmedOwner)
}

Stabilize incremental lint workflow

• Add fetch-depth: 0 to checkout step in lint-go job
• Add ref verification with graceful fallback to full lint if base ref missing

if git rev-parse --verify "$BASE_REF" >/dev/null 2>&1; then
  make golint-incremental BASE_REF="$BASE_REF"
else
  make golint  # Fallback to full lint
fi

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[deep-report] Fix staticcheck QF1003 in pkg/campaign/interactive.go and stabilize incremental lint diff</issue_title>
<issue_description>### Description
Weekly workflow analysis flagged two CI failures caused by staticcheck QF1003 in pkg/campaign/interactive.go:294 and an incremental lint diff fallback that cannot find origin/main. Update the conditional logic to use a tagged switch and ensure the lint workflow reliably has origin/main available (explicit fetch or fallback handling).

Expected Impact

Eliminates recurring CI lint failures and restores stable incremental linting behavior, reducing false negatives and failed runs.

Suggested Agent

CI Failure Doctor or go-fan

Estimated Effort

Medium (1-4 hours)

Data Source

DeepReport Intelligence Briefing 2026-01-26; workflow analysis discussion §21353267144

AI generated by DeepReport - Intelligence Gathering Agent

Comments on the Issue (you are @copilot in this section)

• Fixes [deep-report] Fix staticcheck QF1003 in pkg/campaign/interactive.go and stabilize incremental lint diff #11893

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.