refactor(web): remove deprecated dashboard components and enhance KPI grid

- Deleted unused components: `DashboardActivityTimeline`, `DashboardFramePanel`, `DashboardModulesGrid`, `DashboardRecentJobsGrid`, and `DashboardRecentRevisionsGrid` to streamline the dashboard.
- Updated `DashboardKpiGrid` to improve KPI display logic, including progress indicators and enhanced badge functionality.
- Refactored `DashboardNetworkHealth` to provide better status representation based on loading states and network conditions.
- Introduced new properties for KPI cards to support progress tracking and improved visual feedback.

This cleanup aims to enhance performance and maintainability of the dashboard while providing a better user experience.

migrations/sqlite/000033_domain_resolve_cache.up.sql

@@ -0,0 +1,7 @@
+CREATE TABLE domain_resolve_cache (
+    fqdn         TEXT PRIMARY KEY,
+    addrs_json   TEXT NOT NULL DEFAULT '[]',
+    resolved_at  TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
+);
+
+CREATE INDEX idx_domain_resolve_cache_resolved ON domain_resolve_cache (resolved_at);