Add department-scoped preferences documentation Documents the new department-scoped preferences framework and its first use case (Pharmacy disposal issue to same department): - Department-Scoped-Preferences.md: user-facing overview - Department-Scoped-Preferences-Administrator-Guide.md: admin how-to - Pharmacy-Disposal-Issue-Same-Department.md: feature-specific guide Named with the "Scoped" qualifier to avoid colliding with the existing Department-Preferences.md, which documents application-level config.

buddhika75 committed Jul 17, 2026