feat: predict deposit account created metric

[matthewwalsh0]

Description

Add polymarket_account_created property to transaction events if Predict deposit creates Safe proxy.

Changelog

CHANGELOG entry: null

Related issues

Fixes: #5944

Manual testing steps

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

---

Note

Adds polymarket_account_created metric to Predict deposit transactions by detecting Safe proxy creation via 4-byte prefix, with accompanying tests.

• Metrics:
  • Add polymarket_account_created to getMetaMaskPayProperties for predictDeposit based on nested tx data starting with 0xa1884d2c.
  • Introduce FOUR_BYTE_SAFE_PROXY_CREATE constant for detection.
• Tests:
  • Add tests asserting polymarket_account_created is set to true/false depending on presence of matching nested transaction.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
88.9% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud