- Delete internal vendor API documentation and handoff docs
- Remove vendor-specific AI gateway URLs from CSP whitelist
- Replace vendor-specific log prefixes and comments with generic 'Custom REST'
- Remove vendor-specific default auth header from custom REST implementation
- Remove vendor-specific client header from HTTP requests
- Remove backward-compat vendor format identifier from is_custom_rest_format()
- Remove LEGACY_API_FORMAT constant and normalizeApiFormat() helper
- Update test to not reference legacy format identifier
- Update wiki docs to use generic enterprise gateway configuration
- Update architecture diagrams and ADR-003 to remove vendor references
- Add Buy Me A Coffee link to README
- Update .gitignore to exclude internal user guide and ticket files
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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