refactor: target bootstrap-admin at the active profile instance

[Bccorb]

Summary

Refactors seamless bootstrap-admin to target instances through the CLI's profile system instead of gating on a local seamless.config.json.

Previously the command loaded ./seamless.config.json purely as a presence check — the parsed contents (services.auth.mode) were never read — and resolved the target from SEAMLESS_API_URL, defaulting to http://localhost:3000. That coupled the command to being run from inside a scaffolded project directory.

Now the target instance is resolved from the active profile, consistent with every other instance-facing command (whoami, sessions, users, org, …).

Behavior

Instance URL precedence:

1. SEAMLESS_API_URL env override (backward compatible)
2. Active profile's instanceUrl — respects --profile <name> and SEAMLESS_PROFILE
3. http://localhost:3000 fallback when no profile is configured (preserves the zero-config local flow)

seamless bootstrap-admin admin@co.com                 # active profile, else localhost:3000
seamless bootstrap-admin admin@co.com --profile prod  # targets the "prod" profile
SEAMLESS_API_URL=... seamless bootstrap-admin ...      # explicit override still wins

Auth is intentionally unchanged

Bootstrap runs before any admin user exists, so it cannot authenticate as the profile's user. It continues to use the shared bootstrap secret (Bearer) resolved from .env / auth/.env / docker-compose.yml, or prompts. The profile is used only for targeting, not auth.

Changes

• src/commands/bootstrapAdmin.ts — drop the dead seamless.config.json gate; add resolveApiUrl() and --profile parsing (signature is now (args: string[])).
• src/index.ts — pass args.slice(1) through to the command.
• src/commands/help.ts — document --profile and the new targeting behavior.
• Tests updated (bootstrapAdmin.test.ts, index.test.ts) covering profile targeting, --profile, env override, and localhost fallback.

Testing

• vitest run — 549 passed
• tsc typecheck clean
• Coverage thresholds pass; bootstrapAdmin.ts at 100%