fix: Add run_in_background=false to all agent Task invocations

Ensure all agent executions wait for results before proceeding.
Modified 20 workflow command files with 32 Task call updates.

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/commands/workflow/execute.md

@@ -380,6 +380,7 @@ TodoWrite({
 
 ```bash
 Task(subagent_type="{meta.agent}",
+     run_in_background=false,
      prompt="Execute task: {task.title}
 
      {[FLOW_CONTROL]}