feat(runtime): add agent spawn profile

[Astro-Han]

Summary

• add an explicit local_read profile to the built-in agent catalog and agent_list definitions
• change parent-facing agent_spawn input to use profile + task instead of a free-form agent id
• keep persisted child run agentId as local-read and keep local-read tool isolation unchanged

Continues the #52 subagent profile split after PR #56.

Verification

• npm run -w @maka/runtime test
• npm run -w @maka/headless test
• npm run typecheck
• git diff --check
• fresh-eye reviewer subagent: no P0/P1/P2/P3 findings