Problem

No template uses the policies field on departments. The field exists in TemplateDepartmentConfig and DepartmentPolicies supports review requirements, approval chains, and operational constraints -- but every template leaves it empty.

With #674 adding department detail pages to the org chart, these policies become visible and actionable.

Proposed Changes

Add realistic policies to templates with 3+ departments:

dev_shop

• engineering: code_review_required: true, min_reviewers: 1
• quality_assurance: test_coverage_required: true

product_team

• engineering: code_review_required: true, min_reviewers: 1
• design: design_review_required: true

agency

• engineering: code_review_required: true, min_reviewers: 1
• operations: client_approval_required: true

full_company

• engineering: code_review_required: true, min_reviewers: 2, approval_chain: ["Software Architect", "CTO"]
• security: security_review_required: true, approval_chain: ["Security Engineer", "CTO"]
• operations: change_management_required: true

Scope

YAML-only changes. Policies must conform to whatever DepartmentPolicies schema supports at the time of implementation.

Dependencies

• feat: interactive org chart with department/team CRUD and detail pages #674 -- org chart CRUD (surfaces policies in UI)