fix: replace computed Network enum initialisers with string literals

[hmalik88]

Explanation

• Network enum members were initialised from TrxScope.Mainnet / .Nile / .Shasta (a regular, non-const enum). TypeScript compiles any enum with computed initialisers using the bidirectional numeric-enum pattern, so Object.values(Network) returned 6 values: the 3 CAIP-2 scope IDs plus their reverse-mapped human-readable names ("Mainnet", "Nile", "Shasta").
• bip44:discover iterates Object.values(Network) to check on-chain activity on every scope. When it reached "Mainnet", checkAddressActivity called getTransactionInfoByAddress("Mainnet", addr), which threw "No client configured for network: Mainnet", causing Promise.all to reject and every discovery attempt to silently return [].
• Fix: replace the three enum initialisers with their string literal values. TypeScript emits a one-way map for string-literal enums, so Object.values(Network) now returns only the 3 scope IDs.

Test plan

• yarn workspace @metamask/tron-wallet-snap run build — no type errors
• yarn workspace @metamask/tron-wallet-snap run test — all tests pass
• After publishing a new preview, re-enable the skipped discovers Tron accounts through Account 5 e2e test in metamask-extension and confirm it passes

References

N/A

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
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

[hmalik88]

@metamaskbot publish-preview

[github-actions]

Preview builds have been published. Learn how to use preview builds in other projects.

Expand for full list of packages and versions.

@metamask-previews/bitcoin-wallet-snap@2.0.0-preview-f24e2ee
@metamask-previews/snap-networks-utils@0.0.0-preview-f24e2ee
@metamask-previews/tron-wallet-snap@2.0.0-preview-f24e2ee

[ccharly]

We should really ban enum 🥹