[Bug Report] Handy script starts playing before video finishes buffering

[dumdum7]

Describe the bug
Handy script starts playing before video finishes buffering, which causes them to be unsynchronized. This happens because we trigger the Handy /play API call in the "play" event listener instead of "playing". The former is triggered when you click the play button, while the latter is triggered when the video actually starts playing.

To Reproduce
Steps to reproduce the behavior:

1. Play an interactive scene
2. Turn on network throttling in devtools to trigger buffering in the next step
3. Seek through video to trigger the buffering
4. Notice the /play Handy API call being triggered before the buffering finishes

Expected behavior
Script should start playing after buffering is finished.

Stash Version: (from Settings -> About): v0.27.2

Desktop (please complete the following information):

• OS: Windows
• Browser [e.g. chrome, safari]: Chrome
• Version [e.g. 22]: 131