Combined CTV/APO into minimal TXHASH+CSFS

The original message emphasizes the complexities and potential issues associated with incorporating upgrade hooks into existing systems, suggesting that opting for an alternative opcode might be a simpler and more effective solution. The concern raised revolves around the risk of reordering operations, which could inadvertently simplify conditions to the point where they become trivially true, thus undermining the system's security integrity. This issue is particularly relevant in contexts where the hash type must be explicitly committed within the output to prevent vulnerabilities akin to "anyonecanspend" scenarios, which could otherwise expose the system to unauthorized access or manipulation.

Furthermore, the message reflects on previously overlooked details, highlighting the importance of revisiting and critically analyzing past insights to uncover valuable information or perspectives that were initially missed. This approach underscores the ongoing learning process inherent in programming and system development, encouraging a mindset of continuous inquiry and reassessment to refine and enhance solutions.