Consolidate git identities across ENS addresses and emails via .mailmap

[Copilot]

Consolidates multiple git identities (kushmanmb.eth, kushmanmb.base.eth, Yaketh.eth ENS addresses, plus Kushmanmb@gmx.com and mattbrace92@gmail.com emails) into a single canonical identity for consistent git attribution.

Changes

.mailmap - New file consolidating identities:

Kushman MB <Kushmanmb@gmx.com> <mattbrace92@gmail.com>
Kushman MB <Kushmanmb@gmx.com> <193178375+Kushmanmb@users.noreply.github.com>
Kushman MB <Kushmanmb@gmx.com> Yaketh <193178375+Kushmanmb@users.noreply.github.com>

Verification:

$ git check-mailmap "Yaketh <193178375+Kushmanmb@users.noreply.github.com>"
Kushman MB <Kushmanmb@gmx.com>

$ git log --format="%aN <%aE>" --all | sort -u
Kushman MB <Kushmanmb@gmx.com>

ENS_CONFIGURATION.md - Extended for multi-ENS support:

• Added kushmanmb.base.eth (Base L2) and Yaketh.eth (Mainnet secondary)
• Network-specific resolution instructions for each identity
• API key requirements: ETHERSCAN_API_KEY (Mainnet), BASESCAN_API_KEY (Base L2)

IDENTITY_MANAGEMENT.md - New comprehensive guide:

• Identity consolidation implementation details
• Git configuration for contributors
• ENS integration and maintenance procedures
• Security practices for identity protection

GIT_WORKFLOW_GUIDE.md - Enhanced with:

• Identity management workflow
• Mailmap usage patterns
• Configuration examples for recognized identities

README.md - Updated references to identity documentation

Technical Notes

• All ENS identities already documented in workflow file headers - no workflow changes required
• Mailmap uses standard git conventions for identity mapping
• No credentials or sensitive data in any configuration

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[Yaketh (Kushmanmb)]

Consolidate to Kushmanmb.eth 0x6fb9e80dDd0f5DC99D7cB38b07e8b298A57bF253