#22 Issue 22: [Feature] Milestone-Based Unlocking

[JerryIdoko]

Description:
Some vesting isn't time-based, but deliverable-based (e.g., "Unlock 20% when Mainnet launches"). Introduce a milestone mapping that the Admin can manually trigger to unlock portions of the vault.

Acceptance Criteria:

[ ] Create Milestone struct (id, percentage, is_unlocked).

[ ] Add unlock_milestone(vault_id, milestone_id) restricted to Admin.

[ ] Update claim logic to calculate unlocked tokens based on triggered milestones rather than block timestamps.
Labels: governance, logic

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[Chucks1093]

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[anonfedora]

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