fix: harden CafeUnitTest transaction handling and event parsing

[savvar9991]

Summary

This PR makes the contract testing flow more stable and user-friendly when submitting contracts for NFT badge verification.

Changes

• Added safe timeout handling for long-running or stuck transactions:
  • Prevents infinite “testing/waiting” state
  • Shows a clear message: “Transaction taking too long. Please try again.”
• Hardened TestSuiteResult event parsing:
  • Aggregates all relevant logs into a single result list
  • Adds null/shape guards for args, testResults and assertResults
  • Prevents runtime errors on unexpected/partial logs
• Slightly improved state management around testing status and messages

Rationale

Previously, malformed or partial logs could cause a runtime error during parsing, and long-running transactions could leave the UI in a “stuck” state. This led to confusing UX and unnecessary repeated submissions. The new guards and timeout logic make the flow resilient while keeping the existing behavior for valid events.

[cb-heimdall]

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