feat: add tracing to multichain account service

[montelaidev]

Explanation

This PR adds traces to the Multichain Account Service.

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

---

Note

Adds pluggable tracing to account discovery across EVM, Solana, Bitcoin, and Tron providers with a default no-op fallback and service-level configuration.

• Tracing/Analytics:
  • Add TraceName enum and traceFallback in src/analytics/* with exports.
  • Extend SnapAccountProvider to accept a TraceCallback and provide a protected trace wrapper.
  • Wrap discoverAccounts in tracing for EvmAccountProvider, SolAccountProvider, TrxAccountProvider, and BtcAccountProvider (defaulting to traceFallback).
  • MultichainAccountService accepts optional config.trace and passes it to providers.
• Types:
  • Add MultichainAccountServiceConfig with optional trace and plumb through constructors.
• Tests:
  • Add comprehensive trace behavior tests for all providers and SnapAccountProvider (custom vs fallback, empty/error cases).
  • Update service/provider constructor tests to assert TraceCallback is passed; minor event emission assertion tightened.
• Docs/Meta:
  • Update CHANGELOG.md noting optional tracing configuration.

^{Written by Cursor Bugbot for commit aebc20c. This will update automatically on new commits. Configure here.}

[montelaidev]

@metamaskbot publish-preview

[github-actions]

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