chore(deps): update dependency @types/supertest to v7

[JadenRazo]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/supertest (source)	^6.0.2 → ^7.2.0

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[JadenRazo]

Triage (claude one-shot batch, 2026-05-13)

• Package: @types/supertest ^6.0.2 → ^7.2.0
• Breaking changes in this version: type-only package; v7 tightens some response/request typings.
• Affects this repo: no runtime impact — affects only type compilation in tests.
• Verdict: safe-to-merge

Types-only major; TS will flag any actual incompatibility at compile time.