feat: a roadmap of epics over time

Tickets get a start date next to their due date, both editable on the
ticket page. The Hoja de ruta tab lays the epics out over the months as
bars filled with their progress, with sprints and releases as landmarks
and a line for today.

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

apps/api/openapi.json

@@ -8503,6 +8503,12 @@
             "type": "number",
             "nullable": true
           },
+          "startDate": {
+            "type": "string",
+            "nullable": true,
+            "format": "date",
+            "description": "When work should start (roadmap)"
+          },
           "dueDate": {
             "type": "string",
             "nullable": true,
@@ -8583,6 +8589,7 @@
           "labels",
           "figmaUrl",
           "storyPoints",
+          "startDate",
           "dueDate",
           "links",
           "attachments",
@@ -9070,6 +9077,12 @@
             "minimum": 0,
             "maximum": 100
           },
+          "startDate": {
+            "type": "string",
+            "nullable": true,
+            "format": "date",
+            "description": "When work should start (roadmap)"
+          },
           "dueDate": {
             "type": "string",
             "nullable": true,
@@ -9191,6 +9204,12 @@
             "minimum": 0,
             "maximum": 100
           },
+          "startDate": {
+            "type": "string",
+            "nullable": true,
+            "format": "date",
+            "description": "When work should start (roadmap)"
+          },
           "dueDate": {
             "type": "string",
             "nullable": true,

apps/api/schema.gql

@@ -149,6 +149,9 @@ input CreateIssueInput {
   priority: IssuePriority
   projectId: ID!
   releaseId: ID
+
+  """When work should start (roadmap), YYYY-MM-DD"""
+  startDate: String
   storyPoints: Int
   title: String!
 
@@ -262,6 +265,9 @@ type Issue {
   reporter: UserRef!
   sprint: SprintRef
 
+  """When work should start (roadmap)"""
+  startDate: String
+
   """A status id of the project's settings"""
   status: String!
   statusCategory: StatusCategory!
@@ -955,6 +961,9 @@ input UpdateIssueInput {
   issueId: ID!
   labels: [String!]
   priority: IssuePriority
+
+  """When work should start (roadmap), YYYY-MM-DD"""
+  startDate: String
   storyPoints: Int
   title: String
   type: String