WIP: Save agent roles integration work before CHORUS rebrand

- Agent roles and coordination features
- Chat API integration testing
- New configuration and workspace management

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Co-Authored-By: Claude <noreply@anthropic.com>

vendor/github.com/miekg/dns/CONTRIBUTORS

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+Alex A. Skinner
+Andrew Tunnell-Jones
+Ask Bjørn Hansen
+Dave Cheney
+Dusty Wilson
+Marek Majkowski
+Peter van Dijk
+Omri Bahumi
+Alex Sergeyev
+James Hartig