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>

apps/api/schema.gql

@@ -129,6 +129,15 @@ type AutomationTriggerSpec {
   status: String
 }
 
+type BacklogHealth {
+  noArea: Int!
+  open: Int!
+  stale: Int!
+  staleDays: Int!
+  unassigned: Int!
+  unestimated: Int!
+}
+
 type BoardColumn {
   issues: [Issue!]!
   status: String!
@@ -184,6 +193,22 @@ input ChangeIssueStatusInput {
   status: String!
 }
 
+"""What happened after a moment"""
+type ChangesSince {
+  created: [InsightIssue!]!
+  createdCount: Int!
+  finished: [InsightIssue!]!
+  finishedCount: Int!
+
+  """Times I was mentioned here"""
+  mentions: Int!
+
+  """Sent back from QA"""
+  returned: [InsightIssue!]!
+  returnedCount: Int!
+  since: String!
+}
+
 """A step inside a ticket that does not deserve a ticket of its own"""
 type ChecklistItem {
   done: Boolean!
@@ -598,6 +623,12 @@ input IssueFilterInput {
   dueTo: String
   labels: [String!]
 
+  """Only tickets with no area"""
+  noArea: Boolean
+
+  """Only tickets nobody estimated"""
+  noEstimate: Boolean
+
   """Only tickets in no sprint"""
   noSprint: Boolean
 
@@ -615,6 +646,9 @@ input IssueFilterInput {
   types: [String!]
   unassigned: Boolean
 
+  """Only tickets not updated since this instant (ISO)"""
+  updatedBefore: String
+
   """Only the tickets I follow (none when anonymous)"""
   watching: Boolean
 }
@@ -978,7 +1012,10 @@ type Project {
   """
   The dashboard: sprint under way, overdue / blocked / stuck tickets, aging and bottlenecks
   """
-  insights: ProjectInsights!
+  insights(
+    """ISO instant (e.g. my last visit): also tell what changed after it"""
+    since: String
+  ): ProjectInsights!
 
   """Anyone can read it, also without signing in"""
   isPublic: Boolean!
@@ -1021,13 +1058,21 @@ type ProjectChange {
   version: Int!
 }
 
-"""The dashboard: sprint under way, risks, aging and bottlenecks"""
+"""
+The dashboard: sprint under way, risks, aging, bottlenecks, release forecasts, team load, backlog health and changes
+"""
 type ProjectInsights {
   aging: Aging!
+  backlog: BacklogHealth!
   bottlenecks: [StatusTime!]!
+
+  """Only when asked with `since`"""
+  changes: ChangesSince
   generatedAt: String!
+  releases: [ReleaseForecast!]!
   risks: Risks!
   sprint: SprintPulse
+  team: [TeamLoad!]!
 }
 
 type ProjectMember {
@@ -1237,6 +1282,24 @@ type ReleaseChange {
   version: Int!
 }
 
+"""When a planned release would be finished, at the real pace"""
+type ReleaseForecast {
+  finished: Int!
+
+  """Half of the simulated futures finish by then"""
+  likelyDate: String
+  name: String!
+  releaseId: ID!
+
+  """85% finish by then"""
+  safeDate: String
+  targetDate: String
+  total: Int!
+
+  """DONE, NO_DATE, UNKNOWN (no pace yet), ON_TRACK, AT_RISK or LATE"""
+  verdict: String!
+}
+
 type ReleaseProgress {
   byStatus: [CountByStatus!]!
   finished: Int!
@@ -1450,6 +1513,17 @@ type Subscription {
   sprintChanged(projectId: ID!): SprintChange!
 }
 
+type TeamLoad {
+  blocked: Int!
+  openPoints: Int!
+  openTickets: Int!
+  overloaded: Boolean!
+
+  """Points closed per sprint, last three closed sprints"""
+  pointsPerSprint: Float
+  user: UserRef!
+}
+
 type Throughput {
   count: Int!
   user: UserRef