fix(ci): replace global B113 bandit skip with per-file annotations (#2272)

[mrveiss]

Summary

• Removes B113 (request_without_timeout) from global .bandit skips
• Adds per-line # nosec B113 to test files that use requests.*:
  • infrastructure.integration_test.py (9 calls)
  • phase8_control_panel_test.py (5 calls)
  • voice_integration_test.py (7 calls — bandit false positive, all have timeout=)
• Future production code using requests.* without timeout will now be caught by CI
• Verified: bandit -c .bandit -r autobot-backend/ autobot-slm-backend/ autobot-shared/ -t B113 returns 0 issues

Closes #2272

[github-actions]

✅ SSOT Configuration Compliance: Passing

🎉 No hardcoded values detected that have SSOT config equivalents!