Warn when calling unversioned API paths

[RUKAYAT-CODER]

Background

Requests to unversioned endpoints are silently upgraded to the default version. Emit a deprecation warning so callers can migrate.

Files to modify (2-3)

src/lib/apiVersioning.ts
src/middleware/logger.ts

Acceptance Criteria

Implemented across the listed files

Unit/integration tests added or updated and passing

No regression; follows project coding standards

[MerlinTheWhiz]

@MerlinTheWhiz has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi there, let me handle this. I can implement this nicely.
Please assign.

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Congratulations, @MerlinTheWhiz! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@MerlinTheWhiz's PR #1259 was approved and merged by @RUKAYAT-CODER.

🏆 @MerlinTheWhiz: You earned 45 FoxPoints for this contribution! Your current tier: Specialist (3,155 total points). Track your full progress on GrantFox.

👏 Great work, @MerlinTheWhiz! Keep contributing to rinafcode.

[drips-wave]

This issue has been completed by @MerlinTheWhiz as part of the Stellar Wave Program's 8th Wave 🥳

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