Implement explicit session lifecycle and task-scoped worktrees

tests/project-context.test.ts

@@ -28,6 +28,7 @@ test("project context store reads defaults and applies domain patches", async ()
     },
     enqueueTasks: [
       {
+        taskId: "task-1",
         id: "task-1",
         title: "Build parser",
         status: "pending",
@@ -38,11 +39,13 @@ test("project context store reads defaults and applies domain patches", async ()
   const updated = await store.patchState({
     upsertTasks: [
       {
+        taskId: "task-1",
         id: "task-1",
         title: "Build parser",
         status: "in_progress",
       },
       {
+        taskId: "task-2",
         id: "task-2",
         title: "Add tests",
         status: "pending",
@@ -70,6 +73,7 @@ test("project context parser merges missing root keys with defaults", async () =
       {
         taskQueue: [
           {
+            taskId: "task-1",
             id: "task-1",
             title: "Migrate",
             status: "pending",