fix: F010, F024, F044, F043 — shell script and helper fixes (v21.0.2)… #234

Job	Run time
CloudFormation Lint	39s
cfn-guard (advisory)	7s
Lambda Python Syntax	3s
Handler Regression Check	3s
bandit (advisory)	9s
cfn-nag (advisory)	28s
IAM Completeness (native-dispatch)	4s
New Handler E2E Coverage Check	6s
EventBridge Prefix Parity	4s
Handler Coverage Regression Gate	5s
Configurator HTML Check	6s
Shell Injection Guard	6s
YAML ↔ Configurator Sync Check	3s
CFN Correctness	4s
BatchSize Floor	4s
	2m 11s

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