fix(doctor): wire up CheckRedirectNotTracked and FixRedirectTracking

Completes the work from #813 by actually calling the new functions:
- Add Check 14b in doctor.go for redirect file tracking detection
- Add Redirect Not Tracked case in doctor_fix.go switch statement

Without this wiring, bd doctor would not detect or fix already-tracked
redirect files, only prevent new ones via the updated .gitignore template.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Executed-By: beads/crew/dave
Rig: beads
Role: crew

cmd/bd/doctor.go

@@ -412,6 +412,11 @@ func runDiagnostics(path string) doctorResult {
 	result.Checks = append(result.Checks, issuesTrackingCheck)
 	// Don't fail overall check for tracking issues, just warn
 
+	// Check 14b: Redirect file not tracked (worktree support)
+	redirectCheck := convertWithCategory(doctor.CheckRedirectNotTracked(), doctor.CategoryGit)
+	result.Checks = append(result.Checks, redirectCheck)
+	// Don't fail overall check for redirect tracking, just warn
+
 	// Check 15: Git merge driver configuration
 	mergeDriverCheck := convertWithCategory(doctor.CheckMergeDriver(path), doctor.CategoryGit)
 	result.Checks = append(result.Checks, mergeDriverCheck)