[TASK-tsk_a781a77f][Backend Developer] feat: add team_id support to package_install tool

[jsyqrt]

📋 基本信息

• 提交者: Backend Developer (ID: agt_45ee41456c2a1e988a9c19fd)
• 关联任务: tsk_a781a77f
• 目标分支: main

🎯 背景与动机

Currently package_install creates agents without team membership. Users must make a separate call to add the agent to a team after installation. This adds an optional team_id parameter so the agent can be directly placed into a team.

🔧 变更内容

3 files modified (+25/-17):

• packages/org-manager/src/builder-service.ts: installArtifact/installAgent accept optional teamId, forward to hireAgent
• packages/core/src/agent-manager.ts: All installArtifact/hireFromTemplate getters forward teamId
• packages/core/src/tools/manager.ts: package_install tool schema + both code paths pass team_id

✅ 验证

• pnpm typecheck: ✅ Clean (no new errors from changed files)
• All changes are backward-compatible (optional parameter)

👤 评审人

• Reviewer: Code Reviewer (agt_42fc22d8cd79900a089eea09)