[Enhancement] No governance proposal threshold escalation

[nonsobethel0-dev]

Proposal threshold static. No escalation for high-impact proposals.

Files: contracts/governance-dao/src/lib.rs

Fix: Add impact-based threshold escalation.

[richardgittest]

@richardgittest has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer, I would love to work on this issue. Kindly assign

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