refactor: use Tempo API for token metadata

[decofe]

Summary

• fetch TIP-20 metadata with the tapimo typed client
• support a configurable TEMPO_API_URL while defaulting to https://api.tempo.xyz
• retain localnet and request-failure fallbacks

Validation

• pnpm check
• pnpm check:types
• ./node_modules/.bin/vp test src/lib/tempo.test.ts --project unit (7 passed)
• pnpm test blocked in global setup: local Tempo container returned HTTP 400 while minting the fee payer

Prompted by: @tmm

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	tapimo@​0.3.0

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[socket-security]

Warning

Review the following alerts detected in dependencies.

According to your organization's Security Policy, it is recommended to resolve "Warn" alerts. Learn more about Socket for GitHub.

Action	Severity	Alert  (click "▶" to expand/collapse)
Warn		Protestware or unwanted behavior: npm es5-ext Note: The script attempts to run a local post-install script, which could potentially contain malicious code. The error handling suggests that it is designed to fail silently, which is a common tactic in malicious scripts. From: pnpm-lock.yaml → npm/tapimo@0.3.0 → npm/es5-ext@0.10.64 ℹ Read more on: This package | This alert | What is protestware? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Consider that consuming this package may come along with functionality unrelated to its primary purpose. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore npm/es5-ext@0.10.64. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.

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