Fix token supply inconsistency: update to 750,000 tokens across all files

[Copilot]

This PR resolves a critical inconsistency in token supply values that would cause deployment verification failures.

Problem

The deployment scripts and test files had different totalSupply values:

• scripts/deploy.js and scripts/deploy-DE.js: 500,000 tokens
• test/SEQICO.test.js: 1,000,000 tokens

This inconsistency would cause deployment verification to fail when the actual deployed contract supply doesn't match test expectations.

Solution

Updated all files to use 750,000 tokens as requested by @sonnyquinn24:

// Before
const totalSupply = ethers.parseEther("500000"); // deploy scripts
const totalSupply = ethers.parseEther("1000000"); // test file

// After  
const totalSupply = ethers.parseEther("750000"); // all files

Changes Made

• scripts/deploy.js: Updated totalSupply from 500,000 to 750,000 tokens
• scripts/deploy-DE.js: Updated totalSupply from 500,000 to 750,000 tokens
• test/SEQICO.test.js: Updated totalSupply from 1,000,000 to 750,000 tokens
• README.md: Updated documentation to reflect new 750,000 token supply

All files now consistently reference the same token supply value, ensuring deployment verification will pass and the contract behaves as expected in both deployment and testing scenarios.

Fixes #39.

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

• package-lock.json