feat: enhance contracts error handling and validation#87

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vestor-dev wants to merge 3 commits intorinafcode:mainfrom

vestor-dev:error-handling-and-validation

Commits on Jan 28, 2026

feat: enhance governance and escrow error handling, add TeachLinkError enum
vestor-dev
committed

Commits on Jan 29, 2026

fix: resolve CI failures - formatting, clippy warnings, and test issues
martinvibes
committed
fix: resolve symbol conflict between GovernanceContract and MockToken initialize functions
martinvibes
committed