Summary

Add ceremony policy configuration to the web dashboard. Users should be able to view and edit ceremony scheduling strategy, velocity calculator, and auto-transition settings at all 3 resolution levels (project, department, per-ceremony).

Design Reference

See Ceremony Scheduling design page -- "Configuration" section for the 3-level resolution model.

Requirements

Settings Page Integration

Add ceremony policy section to the existing settings pages:

1. Project-level: In workflow settings, show current ceremony strategy with picker for all 8 strategy types. Show strategy-specific config fields. Show velocity calculator selection. Show auto-transition toggle and threshold slider.
2. Department-level: In department settings (when per-department overrides are supported), show optional ceremony policy override with "inherit from project" default.
3. Per-ceremony: In sprint ceremony list, each ceremony shows its resolved policy with optional override capability.

Visual Feedback

• Show resolved policy for each ceremony (indicating which level it resolved from)
• Strategy change warning banner when a change is pending for next sprint
• Velocity unit indicator that updates based on selected strategy

Code vs UI

All settings editable via both the dashboard UI and as YAML/code config (consistent with existing settings pattern).

Implementation

• New components in web/src/ for ceremony policy editing
• Integration with existing settings pages
• API endpoints for ceremony policy CRUD (may use existing runtime settings system)

Dependencies

• feat: sprint ceremony runtime scheduler with task-driven cadence support #961 (CeremonyPolicyConfig model, CeremonyStrategyType enum)
• feat: ceremony strategy migration UX (warnings, notifications) #978 (strategy migration UX -- warning banners)