chore: remove stories/checker backend dead code

Remove the dead stories/checker backend tracked as design debt in CLAUDE.md:
- Delete internal/api/stories.go, stories_test.go, elaborate.go
- Delete internal/task/story.go, story_test.go
- Remove story/checker columns from storage schema and all CRUD methods
- Remove checkStoryCompletion, spawnCheckerTask, triggerStoryDeploy,
  createValidationTask, checkValidationResult, ShipStory, CheckStoryCompletion
  from executor; simplify handleRunResult
- Remove story/checker fields from task.Task (StoryID, AcceptanceCriteria,
  CheckerForTaskID, CheckerReport)
- Remove story routes and geminiBinPath from API server
- Move claudeJSONResult/extractJSON from elaborate.go to validate.go
- Rename ensureStoryBranch -> ensureBranch in ContainerRunner
- Fix git identity in bare-repo tests; fix initial-branch to use main

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

1 files changed, 2 insertions, 49 deletions

diff --git a/internal/api/server_test.go b/internal/api/server_test.go
index 43d91b0..24e1d30 100644
--- a/internal/api/server_test.go
+++ b/internal/api/server_test.go
@@ -98,7 +98,7 @@ func testServerWithRunner(t *testing.T, runner executor.Runner) (*Server, *stora
 		"gemini": runner,
 	}
 	pool := executor.NewPool(2, runners, store, logger)
-	srv := NewServer(store, pool, nil, logger, "claude", "gemini")
+	srv := NewServer(store, pool, nil, logger, "claude")
 	return srv, store
 }
 
@@ -194,7 +194,7 @@ func testServerWithGeminiMockRunner(t *testing.T) (*Server, *storage.DB) {
 		"gemini": mr,
 	}
 	pool := executor.NewPool(2, runners, store, logger)
-	srv := NewServer(store, pool, nil, logger, "claude", "gemini")
+	srv := NewServer(store, pool, nil, logger, "claude")
 	return srv, store
 }
 
@@ -2069,50 +2069,3 @@ func TestHandleRunTask_CascadesRetryToFailedDeps(t *testing.T) {
 	}
 }
 
-func TestShipStory_ShippableStory_Returns202(t *testing.T) {
-	srv, store := testServer(t)
-
-	proj := &task.Project{
-		ID: "ship-proj-1", Name: "test", RemoteURL: "https://github.com/x/y",
-		Type: "web", DeployScript: "",
-	}
-	if err := store.CreateProject(proj); err != nil {
-		t.Fatalf("CreateProject: %v", err)
-	}
-
-	story := &task.Story{
-		ID: "ship-story-1", Name: "Ship Test", ProjectID: "ship-proj-1",
-		Status: task.StoryShippable, CreatedAt: time.Now().UTC(), UpdatedAt: time.Now().UTC(),
-	}
-	if err := store.CreateStory(story); err != nil {
-		t.Fatalf("CreateStory: %v", err)
-	}
-
-	req := httptest.NewRequest("POST", "/api/stories/ship-story-1/ship", nil)
-	w := httptest.NewRecorder()
-	srv.Handler().ServeHTTP(w, req)
-
-	if w.Code != http.StatusAccepted {
-		t.Errorf("expected 202, got %d: %s", w.Code, w.Body.String())
-	}
-}
-
-func TestShipStory_NonShippable_Returns409(t *testing.T) {
-	srv, store := testServer(t)
-
-	story := &task.Story{
-		ID: "nonship-1", Name: "Not Ready", ProjectID: "",
-		Status: task.StoryInProgress, CreatedAt: time.Now().UTC(), UpdatedAt: time.Now().UTC(),
-	}
-	if err := store.CreateStory(story); err != nil {
-		t.Fatalf("CreateStory: %v", err)
-	}
-
-	req := httptest.NewRequest("POST", "/api/stories/nonship-1/ship", nil)
-	w := httptest.NewRecorder()
-	srv.Handler().ServeHTTP(w, req)
-
-	if w.Code != http.StatusConflict {
-		t.Errorf("expected 409, got %d", w.Code)
-	}
-}