[devkit/cli-v2] Add health subcommand

[Tinna23]

Run the devkit health check and print results.

Usage: devkit health

Output: Pass/fail per check, overall status. Exit code 1 if any check fails.

Files to touch:

• packages/devkit/src/cli/mod.rs
• packages/devkit/src/monitoring/health.rs

[daRk8238]

@daRk8238 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

please assign

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[Fahmedo]

@Fahmedo has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

hello there i would love to take on this issue

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[Caneryy]

@Caneryy has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello, can I work on this issue?

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[drips-wave]

Congratulations, @Fahmedo! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @Fahmedo: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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[Fahmedo]

Resolved in PR #419. Added health subcommand with HealthRegistry, pass/fail checks, --json output, and exit code 1 on any failing check.

[Fahmedo]

Resolved in PR #419. Added health subcommand.