refactor(worker): extend planning contexts with token and worktree

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ClaudeDo.Worker/Planning/PlanningSessionContext.cs

@@ -3,10 +3,14 @@ namespace ClaudeDo.Worker.Planning;
 public sealed record PlanningSessionStartContext(
     string ParentTaskId,
     string WorkingDir,
+    string Token,
+    string WorktreePath,
+    string BranchName,
     PlanningSessionFiles Files);
 
 public sealed record PlanningSessionResumeContext(
     string ParentTaskId,
     string WorkingDir,
     string ClaudeSessionId,
-    string McpConfigPath);
+    string Token,
+    string WorktreePath);