[Promote To I Dan] Referendum #91

Here's a summary of s0me0ne-unkn0wn's contributions to Polkadot:

• They have been working on Polkadot since July 2022 and have been a core developer in the Parachain Core team since October 2022.
• They have made several contributions to the Polkadot codebase, including introducing execution environment parametrization, working on PVF execution determinism, and notable refactorings and improvements.
• They have also written two write-ups on PVF stack metering and achieving cross-platform stack determinism for PVF execution.
• They have participated in discussions on PVF execution determinism and promoted a better understanding of the determinism issues and how to handle them.
• They have applied for Dan I in Polkadot Fellowship and provided their Polkadot address as 13WGadgNgqSjiGQvfhimw9pX26mvGdYQ6XgrjPANSEDRoGMt.