- AbstractClickHouseIT base class with Testcontainers ClickHouse and schema init - ProtocolVersionInterceptor validates X-Cameleer-Protocol-Version:1 on data/agent paths - WebConfig registers interceptor with path patterns, excludes health/docs - Cameleer3ServerApplication with @EnableScheduling and component scanning - application-test.yml with small buffer config for tests Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>