Implement Graceful Contract Upgrade Path

[famvilianity-eng]

Title: Design and Implement Safe Contract Upgrade Mechanism

Description: Once v1.0 is deployed, future versions may need upgrades. Design a safe upgrade path with state migration, validation, and rollback procedures.

Requirements and Context:

• Support state migration from v1.0 to v1.1+
• Validate contract state before and after upgrade
• Document rollback procedures
• Maintain backwards compatibility where possible
• Security: Admin-gated upgrades with community review period

Suggested Execution: feature/contract-upgrade-mechanism

Implement Changes:

• Create /docs/upgrade-procedure.md with step-by-step guide
• Implement migrate_state function for version transitions
• Create state validation helper functions
• Document rollback procedures with safety checks

Test and Commit:

• Unit tests for state migration
• Tests for state validation
• Document upgrade testing in staging environment
• Create pre-upgrade checklist

Example Commit Message:

docs: add safe contract upgrade mechanism and procedures

- Document state migration path for version upgrades
- Create contract validation checks pre/post-upgrade
- Include rollback procedures with safety checks
- Add comprehensive upgrade testing guide

Guidelines:

• Require 7-day admin review period before mainnet upgrades
• Backup all state before upgrade
• Test upgrades on testnet first

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