t3354: fix redundant 2>/dev/null in localdev-helper.sh grep

[marcusquinn]

Summary

• Removes redundant 2>/dev/null from grep -q 'webapp' "$dynamic_yml" in migrate_traefik_to_confd (.agents/scripts/localdev-helper.sh:225)
• File existence is already verified earlier in the function via [[ -f "$dynamic_yml" ]]; the suppression was masking potential permission errors and making debugging harder
• No behaviour change for the happy path; improves debuggability on error paths

Verification

• shellcheck .agents/scripts/localdev-helper.sh — no new violations (pre-existing SC1091 info notice is unrelated)

Closes #3354

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🔍 Code Quality Report

�[0;35m[MONITOR]�[0m Code Review Monitoring Report

�[0;34m[INFO]�[0m Latest Quality Status:
SonarCloud: 0 bugs, 0 vulnerabilities, 414 code smells

�[0;34m[INFO]�[0m Recent monitoring activity:
Sat Mar 14 01:23:46 UTC 2026: Code review monitoring started
Sat Mar 14 01:23:46 UTC 2026: SonarCloud - Bugs: 0, Vulnerabilities: 0, Code Smells: 414

📈 Current Quality Metrics

• BUGS: 0
• CODE SMELLS: 414
• VULNERABILITIES: 0

Generated on: Sat Mar 14 01:23:48 UTC 2026

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Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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