Charles N Wyble d00f3c9f02 fix: resolve shellcheck warnings in shell scripts ...

Improve code quality by addressing shellcheck warnings
across security-critical scripts.

src/security-hardening.sh:
- Add shellcheck directive for SC2120/SC2119
- Function configure_password_policy() accepts optional args
- Directive documents intentional usage pattern

src/firewall-setup.sh:
- Fix function argument passing in main()
- Properly pass arguments to configure_firewall()

config/hooks/installed/encryption-setup.sh:
- Consolidate echo commands to fix SC2129
- Use single redirect for multiple writes

Remaining warnings are non-critical:
- SC1091: Source files exist at runtime in Docker container
- SC2016: Intentional single quotes for sed pattern

No functional changes - purely code quality improvements.

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2026-02-17 10:12:01 -05:00

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