chore(server): add of:doctor self-hosting diagnostics

[Officialhomie]

Summary

Adds a new “doctor” diagnostics command to help self-hosters quickly validate configuration and runtime prerequisites (env, DB, migrations, RPC connectivity) and reduce maintainer support burden.

Commands

• From repo root: pnpm of:doctor
• From server package: pnpm -C packages/server run of:doctor

What it checks

• Environment
  • Verifies critical secrets are present (does not print secret values)
  • Flags common misconfigs with actionable fixes (URLs, treasuries for /stats, etc.)
• Database
  • Non-invasive: does not create a DB file
  • If DB exists: checks connectivity, migrations table presence, and reports pending migrations by comparing against src/db/migrations/*.ts
• Network connectivity
  • Solana RPC health via JSON-RPC getHealth
  • EVM RPC health for any explicitly configured *_RPC_URL env vars via eth_blockNumber
  • Warns on slow endpoints

JSON output + CI friendliness

• Supports --json for structured output.
• Exits non-zero only when failures are present (warnings do not fail).

Files changed

• package.json: add root of:doctor script
• packages/server/package.json: add server of:doctor script
• packages/server/scripts/doctor.ts: implement diagnostics tool (safe secret handling, script-relative migration discovery, bounded timeouts)

Test plan

• Run pnpm of:doctor
• Run pnpm of:doctor -- --json

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