Add important notice about Polymarket resolutions

[pax-k]

Added a warning about Polymarket's resolution process and its reliance on monetary influence.

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Note

Adds an "IMPORTANT NOTICE" to the README describing Polymarket resolution mechanics with an example link.

• Documentation:
  • Update README.md with an IMPORTANT NOTICE explaining how Polymarket resolutions work, including an example link to a resolved market.

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