feat: dashboard forecasts releases, tells what changed and weighs the load

The insights reading grows (GraphQL insights(since:), REST ?since=, MCP):
- planned releases with a likely (p50) and safe (p85) finish date from a
  Monte Carlo over the last six weeks of finished work, one after another,
  and a verdict against their target;
- with `since` (the viewer's last visit, kept in the browser): tickets
  created, finished and sent back from QA, and their mentions;
- each person's open points against what they closed per sprint lately;
- open tickets without estimate, area or assignee, or untouched for 90
  days, each count opening the list filtered (new noEstimate, noArea and
  updatedBefore filters).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/web/tracker/infrastructure/src/lib/adapters/graphql-projects.gateway.ts

@@ -63,10 +63,13 @@ export class GraphqlProjectsGateway extends ProjectsGateway {
       .pipe(map((d) => toStats(d.project.stats)));
   }
 
-  insights(projectId: string): Observable<ProjectInsights> {
+  insights(
+    projectId: string,
+    since: string | null,
+  ): Observable<ProjectInsights> {
     return this.gql
-      .query(ProjectInsightsDocument, { idOrKey: projectId })
-      .pipe(map((d) => d.project.insights));
+      .query(ProjectInsightsDocument, { idOrKey: projectId, since })
+      .pipe(map((d) => d.project.insights as ProjectInsights));
   }
 
   analytics(projectId: string, days: number): Observable<ProjectAnalytics> {