Build GitHub Action: NEAR Contract Upgrade

Overview

Create a GitHub Action for safely upgrading NEAR smart contracts with migration support.

Why This Matters

Contract upgrades are risky. An action with built-in safety checks prevents mistakes.

Technical Requirements

Action Usage

- name: Upgrade Contract
  uses: near-actions/upgrade-contract@v1
  with:
    account-id: mycontract.near
    new-wasm: ./target/release/contract.wasm
    migration-method: migrate
    migration-args: '{}'
    backup: true

Deliverables

1. Upgrade action
2. Migration support
3. Backup/rollback
4. Documentation

Budget: 8 NEAR

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