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/requests.dto.ts

@@ -330,6 +330,17 @@ export class AnalyticsQueryDto {
   days = 90;
 }
 
+export class InsightsQueryDto {
+  @ApiPropertyOptional({
+    description:
+      'ISO instant (e.g. your last visit): the answer also tells what changed after it',
+    example: '2026-10-14T08:00:00Z',
+  })
+  @IsOptional()
+  @IsISO8601()
+  since?: string;
+}
+
 export class ChangeMemberRoleDto {
   @ApiProperty({ enum: ProjectRole, enumName: 'ProjectRole' })
   @IsEnum(ProjectRole)
@@ -609,6 +620,25 @@ export class IssueSearchQueryDto extends PageQueryDto {
   @Matches(/^\d{4}-\d{2}-\d{2}$/)
   dueTo?: string;
 
+  @ApiPropertyOptional({ description: 'Only tickets nobody estimated' })
+  @IsOptional()
+  @Transform(toBoolean)
+  @IsBoolean()
+  noEstimate?: boolean;
+
+  @ApiPropertyOptional({ description: 'Only tickets with no area' })
+  @IsOptional()
+  @Transform(toBoolean)
+  @IsBoolean()
+  noArea?: boolean;
+
+  @ApiPropertyOptional({
+    description: 'Only tickets not updated since this instant (ISO)',
+  })
+  @IsOptional()
+  @IsISO8601()
+  updatedBefore?: string;
+
   @ApiPropertyOptional({
     type: [String],
     example: ['BROWSER:Safari'],