Security: IP allowlist checks review (`ip-range-check` usage audit)

[greatest0fallt1me]

Description

Audit any IP range usage for admin/gateway endpoints; add tests for boundary CIDRs and spoofing-resistant behavior behind proxies.

Requirements and context

• Document trusted proxy headers configuration.
• Avoid breaking IPv6 deployments.

Suggested execution

• Fork the repo and create a branch: git checkout -b chore/ip-allowlist-audit
• Work in Callora-Backend (TypeScript / Express).

Primary paths

src/types/ip-range-check.d.ts + call sites (search repo)

• Run npm run lint, npm run typecheck, and npm test.

Deliverables

• Tests + documentation in PR description.

Test and commit

• Add or extend unit and/or integration tests (src/**/*.test.ts, tests/integration/**).
• Paste summarized test output in the PR; call out security or data-integrity notes.

Example commit message

chore(security): audit ip allowlist usage

Guidelines

• Tests should cover new behavior and important edge cases.
• Keep changes focused; follow existing patterns in the codebase.
• Timeframe: 96 hours from assignment unless agreed otherwise.

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[olaleyeolajide81-sketch]

@olaleyeolajide81-sketch has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

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This issue has been completed by @olaleyeolajide81-sketch as part of the Stellar Wave Program's 3rd Wave 🥳

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