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/api/tracker/presenters/src/lib/http/dto/responses.dto.ts

@@ -943,6 +943,69 @@ export class StatusTimeDto {
   @ApiProperty() overLimit!: boolean;
 }
 
+export class ReleaseForecastDto {
+  @ApiProperty({ format: 'uuid' }) releaseId!: string;
+  @ApiProperty() name!: string;
+  @ApiProperty({ type: String, nullable: true, format: 'date' })
+  targetDate!: string | null;
+  @ApiProperty() total!: number;
+  @ApiProperty() finished!: number;
+  @ApiProperty({
+    type: String,
+    nullable: true,
+    format: 'date',
+    description: 'Half of the simulated futures finish by then',
+  })
+  likelyDate!: string | null;
+  @ApiProperty({
+    type: String,
+    nullable: true,
+    format: 'date',
+    description: '85% finish by then',
+  })
+  safeDate!: string | null;
+  @ApiProperty({
+    enum: ['DONE', 'NO_DATE', 'UNKNOWN', 'ON_TRACK', 'AT_RISK', 'LATE'],
+  })
+  verdict!: string;
+}
+
+export class ChangesSinceDto {
+  @ApiProperty() since!: string;
+  @ApiProperty({ type: [InsightIssueDto] }) created!: InsightIssueDto[];
+  @ApiProperty() createdCount!: number;
+  @ApiProperty({ type: [InsightIssueDto] }) finished!: InsightIssueDto[];
+  @ApiProperty() finishedCount!: number;
+  @ApiProperty({ type: [InsightIssueDto], description: 'Sent back from QA' })
+  returned!: InsightIssueDto[];
+  @ApiProperty() returnedCount!: number;
+  @ApiProperty({ description: 'Times you were mentioned here' })
+  mentions!: number;
+}
+
+export class TeamLoadDto {
+  @ApiProperty({ type: UserRefDto }) user!: UserRefDto;
+  @ApiProperty() openTickets!: number;
+  @ApiProperty() openPoints!: number;
+  @ApiProperty() blocked!: number;
+  @ApiProperty({
+    type: Number,
+    nullable: true,
+    description: 'Points closed per sprint, last three closed sprints',
+  })
+  pointsPerSprint!: number | null;
+  @ApiProperty() overloaded!: boolean;
+}
+
+export class BacklogHealthDto {
+  @ApiProperty() open!: number;
+  @ApiProperty() unestimated!: number;
+  @ApiProperty() noArea!: number;
+  @ApiProperty() unassigned!: number;
+  @ApiProperty() stale!: number;
+  @ApiProperty() staleDays!: number;
+}
+
 export class ProjectInsightsDto {
   @ApiProperty() generatedAt!: string;
   @ApiProperty({ type: SprintPulseDto, nullable: true })
@@ -950,4 +1013,13 @@ export class ProjectInsightsDto {
   @ApiProperty({ type: RisksDto }) risks!: RisksDto;
   @ApiProperty({ type: AgingDto }) aging!: AgingDto;
   @ApiProperty({ type: [StatusTimeDto] }) bottlenecks!: StatusTimeDto[];
+  @ApiProperty({ type: [ReleaseForecastDto] }) releases!: ReleaseForecastDto[];
+  @ApiProperty({
+    type: ChangesSinceDto,
+    nullable: true,
+    description: 'Only when asked with `since`',
+  })
+  changes!: ChangesSinceDto | null;
+  @ApiProperty({ type: [TeamLoadDto] }) team!: TeamLoadDto[];
+  @ApiProperty({ type: BacklogHealthDto }) backlog!: BacklogHealthDto;
 }