0.3.0

What's changed

Crate	Version
upone	0.3.0
upone-core	0.3.0
upone-providers	0.3.0

upone

• Add upone ready subcommand for non-invasive environment readiness verification and integrate post-setup readiness sweep into upone up.
• update upone-core 0.2.0 -> 0.3.0
• update upone-providers 0.2.0 -> 0.3.0

upone-core

• Add minimal environment readiness validation layer abstractions (ReadinessCheck, ReadinessStatus, ReadinessReport, sweep), .env* key resolver, and .env.example parser. Extend Provider trait with readiness_checks.

upone-providers

• Implement readiness checks for postgres, redis, prisma, drizzle, cargo, and better-auth providers, and export collect_readiness_checks helper.