Add invalid lock ID failure tests

[Brainoncrack]

Description

Difficulty: Expert

Type: Test

Summary

Add tests for operations using invalid or missing lock IDs.

Current Behaviour

Invalid lock references should fail safely without mutating state.

Expected Behaviour

The contract should reject unknown, malformed, or wrong-owner lock IDs.

Suggested Implementation

Create tests for read, withdraw, and status checks using invalid lock IDs.

Files or Areas Likely Affected

tests/
src/

Acceptance Criteria

• Unknown lock ID is rejected.
• Wrong-owner lock ID is rejected.
• Malformed lock ID is handled where applicable.
• State remains unchanged.
• Expected errors are documented.

Additional Notes

This protects lock operations.

[Adebisi1111]

I intend to work on this issue.

[Adebisi1111]

I intend to work on this issue on behalf of @Adebisi1111 — please assign it to us under the Official Campaign | FWC26.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@Adebisi1111's PR #397 was approved and merged by @El-swaggerito.

🏆 @Adebisi1111: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (223 total points). Track your full progress on GrantFox.

👏 Great work, @Adebisi1111! Keep contributing to Axionvera.