FOLLOW-UP: Cache user role per WebSocket connection (from PR #273)

[adnaan]

Context

This follow-up task was identified during the review of PR #273.

Source PR: #273
PR Title: feat: add authorization / RBAC system (Roadmap 2.3)
Suggested by: @claude[bot]

Task Description

The generated handler calls getUserRole() (which does GetUserByID()) on every Edit, Update, RequestDelete, and ConfirmDelete action. Since LiveTemplate uses long-lived WebSocket connections and roles change infrequently, the role should be cached per connection lifetime.

Options:

• Cache the role in the controller state after first load
• Store role in LiveTemplate session context during Mount
• Use ctx.UserID() + in-memory LRU cache with short TTL

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This issue was automatically created by prmonitor from PR review comments.