NATS cluster mode and test matrix#76

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poelzi wants to merge 16 commits intobluecatengineering:masterfrom

cluster21:nats-backend-and-tests

Commits on Feb 27, 2026

WP01: Add cluster mode foundation and config surface
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WP02: Add nats-coordination crate for clustered DHCP lease and host-option coordination
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WP03: Add DHCPv4 clustered lease flow with backend abstraction, degraded mode, and metrics
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WP04: Add host-option-sync plugin with identity resolution, lookup, and enrichment
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WP05+CHG-001: Add stateful DHCPv6 clustering and move metrics to per-plugin lazy_static
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feat: Add dhcp-loadtest tool for NATS-mode load testing
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nix: Add dhcp-loadtest package and NATS JetStream integration test
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test(nix): add DHCP client compatibility matrix framework
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nix: wire client matrix checks and refactor NATS load test
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chore: add justfile workflows for matrix and CI
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chore: update .gitignore for AI tool directories
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fix(nats-leases): improve clustered conflict resolution with IP quarantining
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fixup! WP03: Add DHCPv4 clustered lease flow with backend abstraction, degraded mode, and metrics
poelzi
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fixup! WP04: Add host-option-sync plugin with identity resolution, lookup, and enrichment
poelzi
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fixup! WP05+CHG-001: Add stateful DHCPv6 clustering and move metrics to per-plugin lazy_static
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docs: clarify clustered architecture and message flow
poelzi
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