feat: Phase 4 — story-aware execution, branch clone, story completion check, deployment status

- ContainerRunner: add Store field; clone with --reference when story has a
  local project path; checkout story branch after clone; push to story branch
  instead of HEAD
- executor.Store interface: add GetStory, ListTasksByStory, UpdateStoryStatus
- Pool.handleRunResult: trigger checkStoryCompletion when a story task succeeds
- Pool.checkStoryCompletion: transitions story to SHIPPABLE when all tasks done
- serve.go: wire Store into each ContainerRunner
- stories.go: update createStoryBranch to fetch+checkout from origin/master base;
  add GET /api/stories/{id}/deployment-status endpoint
- server.go: register deployment-status route
- Tests: TestPool_CheckStoryCompletion_AllComplete/PartialComplete,
  TestHandleStoryDeploymentStatus

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

1 files changed, 45 insertions, 0 deletions

diff --git a/internal/api/stories_test.go b/internal/api/stories_test.go
index cf522e1..17bea07 100644
--- a/internal/api/stories_test.go
+++ b/internal/api/stories_test.go
@@ -7,7 +7,9 @@ import (
 	"net/http/httptest"
 	"strings"
 	"testing"
+	"time"
 
+	"github.com/thepeterstone/claudomator/internal/deployment"
 	"github.com/thepeterstone/claudomator/internal/task"
 )
 
@@ -202,3 +204,46 @@ func TestHandleStoryApprove_WiresDepends(t *testing.T) {
 		t.Errorf("task3.DependsOn: want [%s], got %v", task2.ID, task3.DependsOn)
 	}
 }
+
+func TestHandleStoryDeploymentStatus(t *testing.T) {
+	srv, store := testServer(t)
+
+	// Create a story.
+	now := time.Now().UTC()
+	story := &task.Story{
+		ID:        "deploy-story-1",
+		Name:      "Deploy Status Story",
+		Status:    task.StoryInProgress,
+		CreatedAt: now,
+		UpdatedAt: now,
+	}
+	if err := store.CreateStory(story); err != nil {
+		t.Fatalf("CreateStory: %v", err)
+	}
+
+	// Request deployment status — no tasks yet.
+	req := httptest.NewRequest("GET", "/api/stories/deploy-story-1/deployment-status", nil)
+	w := httptest.NewRecorder()
+	srv.mux.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+
+	var status deployment.Status
+	if err := json.NewDecoder(w.Body).Decode(&status); err != nil {
+		t.Fatalf("decode: %v", err)
+	}
+	// No tasks → no commits → IncludesFix = false (nothing to check).
+	if status.IncludesFix {
+		t.Error("expected IncludesFix=false when no commits")
+	}
+
+	// 404 for unknown story.
+	req2 := httptest.NewRequest("GET", "/api/stories/nonexistent/deployment-status", nil)
+	w2 := httptest.NewRecorder()
+	srv.mux.ServeHTTP(w2, req2)
+	if w2.Code != http.StatusNotFound {
+		t.Errorf("expected 404 for unknown story, got %d", w2.Code)
+	}
+}