spike: Privy research

[skurzyp-blockydevs]

• create a doc
• research integration with hedera and potential integration with agentic wallet
• list limitations and potential blockers

[walkerlj0]

Put doc here: https://drive.google.com/file/d/1lDhoUdlH8E3Q5Rx4P_HRl5qUHyrXyYVl/view?usp=drive_link