refactor: replace Task.Project+RepositoryURL+BranchName with ProjectID FKstory/task-project-fk

- Task.Project (human-readable name) replaced by Task.ProjectID (FK to Project.ID)
- Task.RepositoryURL changed to derived-only (yaml:"-"), computed at runtime from ProjectID
- Validator now accepts project_id OR repository_url (either satisfies the requirement)
- Update task_test.go and validator_test.go accordingly

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 7 insertions, 7 deletions

diff --git a/internal/task/task_test.go b/internal/task/task_test.go
index e6a17b8..72ff049 100644
--- a/internal/task/task_test.go
+++ b/internal/task/task_test.go
@@ -101,18 +101,18 @@ func TestDuration_MarshalYAML(t *testing.T) {
 	}
 }
 
-func TestTask_ProjectField(t *testing.T) {
+func TestTask_ProjectIDField(t *testing.T) {
 	t.Run("struct assignment", func(t *testing.T) {
-		task := Task{Project: "my-project"}
-		if task.Project != "my-project" {
-			t.Errorf("expected Project 'my-project', got %q", task.Project)
+		task := Task{ProjectID: "proj-123"}
+		if task.ProjectID != "proj-123" {
+			t.Errorf("expected ProjectID 'proj-123', got %q", task.ProjectID)
 		}
 	})
 
 	t.Run("yaml parsing", func(t *testing.T) {
 		yaml := `
 name: "Test Task"
-project: my-project
+project_id: proj-123
 agent:
   instructions: "Do something"
 `
@@ -123,8 +123,8 @@ agent:
 		if len(tasks) != 1 {
 			t.Fatalf("expected 1 task, got %d", len(tasks))
 		}
-		if tasks[0].Project != "my-project" {
-			t.Errorf("expected Project 'my-project', got %q", tasks[0].Project)
+		if tasks[0].ProjectID != "proj-123" {
+			t.Errorf("expected ProjectID 'proj-123', got %q", tasks[0].ProjectID)
 		}
 	})
 }