refactor: rename action→activity, statemachine→workflow, remove HTTP API layer

- action/ → activity/ (Temporal activities)
- statemachine/ → workflow/ (Temporal workflows)
- Removed internal/api/ and cmd/server/ (api-gw handles HTTP, Temporal is the API)
- Created pkg/types/types.go as single source of truth for all shared types
- Extracted CallRoleLLM helper (DRY: implementer/planner/judge shared pattern)
- Fixed circular import: workflow_graph_query uses string activity names
- Fixed logger.logf → logger.Info/Warn (method didn't exist)
- Fixed routing types: added Branches, Activity, BackoffSeconds, TaskActivity
- Fixed db.Canvas.Name, db.Client→DB, GetWorkflow→FetchWorkflow
- Removed unused imports
- All tests pass, build clean, vet clean

cmd/worker/main.go

@@ -11,11 +11,11 @@ import (
 
 	"go.temporal.io/sdk/client"
 	"go.temporal.io/sdk/worker"
-	"github.com/rockliang/poimen/workflows/action"
+	"github.com/rockliang/poimen/workflows/activity"
 	"github.com/rockliang/poimen/workflows/internal/config"
 	"github.com/rockliang/poimen/workflows/internal/health"
 	"github.com/rockliang/poimen/workflows/internal/logging"
-	"github.com/rockliang/poimen/workflows/statemachine"
+	"github.com/rockliang/poimen/workflows/workflow"
 )
 
 func main() {
@@ -48,56 +48,56 @@ func main() {
 	}
 
 	// Register all workflows
-	w.RegisterWorkflow(statemachine.OrchestratorWorkflow)
-	w.RegisterWorkflow(statemachine.TaskUnitWorkflow)
-	w.RegisterWorkflow(statemachine.TestWorkflow)
-	w.RegisterWorkflow(statemachine.RoutingWorkflow)
-	w.RegisterWorkflow(statemachine.WorkflowGraphQuery)
+	w.RegisterWorkflow(workflow.OrchestratorWorkflow)
+	w.RegisterWorkflow(workflow.TaskUnitWorkflow)
+	w.RegisterWorkflow(workflow.TestWorkflow)
+	w.RegisterWorkflow(workflow.RoutingWorkflow)
+	w.RegisterWorkflow(workflow.WorkflowGraphQuery)
 
 	// Register all activities
-	w.RegisterActivity(action.CloneRepoActivity)
-	w.RegisterActivity(action.GitWorktreeAddActivity)
-	w.RegisterActivity(action.GitCommitActivity)
-	w.RegisterActivity(action.GitPushActivity)
-	w.RegisterActivity(action.GitSquashMergeActivity)
-	w.RegisterActivity(action.GitDiffActivity)
-	w.RegisterActivity(action.PrepareSkillsActivity)
-	w.RegisterActivity(action.PlanningActivity)
-	w.RegisterActivity(action.ImplementerActivity)
-	w.RegisterActivity(action.JudgeActivity)
+	w.RegisterActivity(activity.CloneRepoActivity)
+	w.RegisterActivity(activity.GitWorktreeAddActivity)
+	w.RegisterActivity(activity.GitCommitActivity)
+	w.RegisterActivity(activity.GitPushActivity)
+	w.RegisterActivity(activity.GitSquashMergeActivity)
+	w.RegisterActivity(activity.GitDiffActivity)
+	w.RegisterActivity(activity.PrepareSkillsActivity)
+	w.RegisterActivity(activity.PlanningActivity)
+	w.RegisterActivity(activity.ImplementerActivity)
+	w.RegisterActivity(activity.JudgeActivity)
 	// Integration and lessons activities - register when fully tested
-	w.RegisterActivity(action.RunIntegrationTestActivity)
-	// w.RegisterActivity(action.UpdateLessonsActivity)
-	// w.RegisterActivity(action.ReadLessonsActivity)
+	w.RegisterActivity(activity.RunIntegrationTestActivity)
+	// w.RegisterActivity(activity.UpdateLessonsActivity)
+	// w.RegisterActivity(activity.ReadLessonsActivity)
 
 	// Routing workflow activities
-	w.RegisterActivity(action.LLMRouterActivity)
-	w.RegisterActivity(action.ValidateWorkflowSpecActivity)
-	w.RegisterActivity(action.ValidateCronWorkflowSpecActivity)
+	w.RegisterActivity(activity.LLMRouterActivity)
+	w.RegisterActivity(activity.ValidateWorkflowSpecActivity)
+	w.RegisterActivity(activity.ValidateCronWorkflowSpecActivity)
 
 	// Analysis activities
-	w.RegisterActivity(action.AnalyzeCodeActivity)
-	w.RegisterActivity(action.SecurityScanActivity)
-	w.RegisterActivity(action.GenerateReportActivity)
+	w.RegisterActivity(activity.AnalyzeCodeActivity)
+	w.RegisterActivity(activity.SecurityScanActivity)
+	w.RegisterActivity(activity.GenerateReportActivity)
 
 	// Notification and utility activities
-	w.RegisterActivity(action.NotifyStatusActivity)
-	w.RegisterActivity(action.ArchiveResultsActivity)
-	w.RegisterActivity(action.DeploymentPreCheckActivity)
-	w.RegisterActivity(action.ApproveWorkflowActivity)
+	w.RegisterActivity(activity.NotifyStatusActivity)
+	w.RegisterActivity(activity.ArchiveResultsActivity)
+	w.RegisterActivity(activity.DeploymentPreCheckActivity)
+	w.RegisterActivity(activity.ApproveWorkflowActivity)
 
 	// Authentication activities
-	w.RegisterActivity(action.AssumeRoleActivity)
+	w.RegisterActivity(activity.AssumeRoleActivity)
 
 	// Memory activities
-	w.RegisterActivity(action.RetrieveMemoryActivity)
+	w.RegisterActivity(activity.RetrieveMemoryActivity)
 
 	// GraphRAG activities
-	w.RegisterActivity(action.FetchCanvasRelationsActivity)
-	w.RegisterActivity(action.QueryGraphRAGActivity)
-	w.RegisterActivity(action.CanvasReasonerActivity)
-	w.RegisterActivity(action.IndexGraphRAGActivity)
-	w.RegisterActivity(action.CanvasCompatibilityActivity)
+	w.RegisterActivity(activity.FetchCanvasRelationsActivity)
+	w.RegisterActivity(activity.QueryGraphRAGActivity)
+	w.RegisterActivity(activity.CanvasReasonerActivity)
+	w.RegisterActivity(activity.IndexGraphRAGActivity)
+	w.RegisterActivity(activity.CanvasCompatibilityActivity)
 
 	// Initialize health checker
 	healthChecker := health.NewChecker(c)