Rho X: add open interest

[gephaest]

Hello.
Could you please add OI stats for Rho X?

https://defillama.com/protocol/rho-x

Thanks,
Valentin

[llamabutler]

The rho-oi.ts adapter exports:

> [email protected] test
> ts-node --transpile-only cli/testAdapter.ts open-interest rho-oi.ts

🦙 Running RHO-OI.TS adapter 🦙
---------------------------------------------------
Start Date:	Mon, 03 Nov 2025 00:00:00 GMT
End Date:	Tue, 04 Nov 2025 00:00:00 GMT
---------------------------------------------------

ETHEREUM 👇
Open interest at end: 16.91 M

[treeoflife2]

@gephaest closing as can't edit this PR, created new PR at #4608