Backfill YAML front matter on all story files

Add name and test_plan front matter to 31 story files that were
missing it. Upcoming stories get test_plan: pending, current and
archived get test_plan: approved.

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

.story_kit/stories/upcoming/29_directory_based_workflow_coordination.md

@@ -1,3 +1,8 @@
+---
+name: Directory-Based Workflow Coordination and Locks
+test_plan: pending
+---
+
 # Story 29: Directory-Based Workflow Coordination and Locks
 
 ## User Story

.story_kit/stories/upcoming/32_worktree_agent_orchestration.md

@@ -1,3 +1,8 @@
+---
+name: Worktree Agent Orchestration — Dynamic Port Management
+test_plan: pending
+---
+
 # Story 32: Worktree Agent Orchestration — Dynamic Port Management
 
 ## User Story

.story_kit/stories/upcoming/33_worktree_diff_and_editor_integration.md

@@ -1,3 +1,8 @@
+---
+name: Worktree Diff Inspection and Editor Integration
+test_plan: pending
+---
+
 # Story 33: Worktree Diff Inspection and Editor Integration
 
 ## User Story

.story_kit/stories/upcoming/34_agent_configuration_and_roles.md

@@ -1,3 +1,8 @@
+---
+name: Per-Project Agent Configuration and Role Definitions
+test_plan: pending
+---
+
 # Story 34: Per-Project Agent Configuration and Role Definitions
 
 ## User Story

.story_kit/stories/upcoming/35_agent_security_and_sandboxing.md

@@ -1,3 +1,8 @@
+---
+name: Agent Security and Sandboxing
+test_plan: pending
+---
+
 # Story 35: Agent Security and Sandboxing
 
 ## User Story

.story_kit/stories/upcoming/36_enforce_story_front_matter.md

@@ -1,3 +1,8 @@
+---
+name: Enforce Front Matter on All Story Files
+test_plan: pending
+---
+
 # Story 36: Enforce Front Matter on All Story Files
 
 ## User Story