feat(utils, tron): consolidate security alerts api

[taran-a]

Explanation

Consolidation of the transaction-scan implementations shared by the Solana, Stellar, and Tron snaps: the HTTP envelope of the per-chain Security Alerts (Blockaid) scan clients moves into @metamask/snap-networks-utils, and Tron adopts it. Chain-specific request/response payloads intentionally stay per-snap.

snap-networks-utils (new module):

• SecurityAlertsApiClient — thin envelope: POSTs a typed JSON body to a single scanUrl (validated once at construction), throws SecurityAlertsHttpError (status + body) on non-2xx, validates the response against a caller-provided Superstruct struct (mandatory — response validation can no longer be skipped)
• Scan vocabulary: SecurityAlertsScanOption, SecurityAlertsScanStatus, SecurityAlertResponse, SecurityAlertsScanRequestBase, normalizeScanOrigin

tron-wallet-snap (refactor, no behavior change):

• Deletes the local SecurityAlertsApiClient wrapper; TransactionScanService uses the shared client directly
• Tron-specific helpers (isContractTypeSupported, request-body build checked via satisfies TronScanRequestBody) move into the service/utils — scanning policy now lives in one layer
• Dedupes ScanStatus / SecurityAlertResponse / origin-mapping constants

References

• Related to WPN-1638

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

[sonarqubecloud]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
96.8% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[taran-a]

@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@3.1.0-preview-bbe2c39
@metamask-previews/snap-networks-utils@1.0.0-preview-bbe2c39
@metamask-previews/solana-wallet-snap@7.0.0-preview-bbe2c39
@metamask-previews/stellar-wallet-snap@1.1.0-preview-bbe2c39
@metamask-previews/tron-wallet-snap@4.0.0-preview-bbe2c39