FN-7425: add GitLab tracking metadata to tasks

Persist GitLab tracking metadata and surface it across task APIs and dashboard views.

- add task-store schema, migration, and update helpers for linked GitLab items and stale state
- expose validated GitLab tracking updates through task workflow routes and legacy task payloads
- render GitLab badges, detail-panel metadata, open/unlink actions, styling, i18n strings, and docs
- cover persistence, route validation, task card badges, and task detail interactions with tests
- add a patch changeset for the published Fusion package

Files changed:
 .changeset/fn-7425-gitlab-tracking.md              |   7 ++
 docs/cli-reference.md                              |   2 +-
 docs/dashboard-guide.md                            |   3 +
 packages/core/src/__tests__/db-migrate.test.ts     |  29 +++++
 .../src/__tests__/store-gitlab-tracking.test.ts    | 138 +++++++++++++++++++++
 packages/core/src/db.ts                            |  10 +-
 packages/core/src/gitlab-tracking.ts               |  10 ++
 packages/core/src/index.ts                         |   3 +-
 packages/core/src/store.ts                         | 135 +++++++++++++++++++-
 packages/core/src/types.ts                         |  49 ++++++++
 packages/dashboard/app/api/legacy.ts               |   3 +
 packages/dashboard/app/components/GitLabBadge.tsx  |  33 +++++
 packages/dashboard/app/components/TaskCard.tsx     |   7 +-
 .../dashboard/app/components/TaskCardBadge.tsx     |  15 ++-
 .../dashboard/app/components/TaskDetailModal.css   |  47 +++++--
 .../dashboard/app/components/TaskDetailModal.tsx   | 134 +++++++++++++++++++-
 .../app/components/__tests__/TaskCard.test.tsx     |  49 ++++++++
 .../TaskDetailModal.gitlab-tracking.test.tsx       | 121 ++++++++++++++++++
 .../__tests__/TaskDetailModal.test-helpers.ts      |   1 +
 packages/dashboard/app/styles.css                  |   9 ++
 .../src/__tests__/routes-tasks-ops.test.ts         | 136 ++++++++++++++++++++
 packages/dashboard/src/gitlab.ts                   |  24 +++-
 packages/dashboard/src/routes/register-gitlab.ts   |   1 +
 .../src/routes/register-task-workflow-routes.ts    | 106 +++++++++++++++-
 packages/i18n/locales/en/app.json                  |  31 +++++
 packages/i18n/src/resources.d.ts                   |  31 +++++
 26 files changed, 1106 insertions(+), 28 deletions(-)

Fusion-Task-Id: FN-7425

Fusion-Task-Lineage: 9b5e6005-7284-402e-995c-553be2275eff

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>

packages/dashboard/app/api/legacy.ts

@@ -68,6 +68,8 @@ import type {
   ResearchRunStatus,
   TaskPriority,
   TaskSourceIssue,
+  TaskGitLabTracking,
+  TaskGitLabTrackedItem,
   PrConflictDiagnostics,
   PrInfo,
   ManagedDockerNodeInput,
@@ -535,6 +537,7 @@ export function updateTask(
       repoOverride?: string | null;
       issue?: null;
     } | null;
+    gitlabTracking?: (Omit<TaskGitLabTracking, "item"> & { item?: TaskGitLabTrackedItem | null }) | null;
     dismissNearDuplicate?: boolean;
   },
   projectId?: string,