fix(logging): set flush_mode: interval on vmware_loginsight buffer#157
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Default fluentd buffer flush_mode is "lazy", which uses timekey-based chunking — the operator's vmware-loginsight wrapper sets `<buffer tag,time>` with `timekey 10m`/`timekey_wait 1m`, so chunks sit on disk up to ~11 min before flushing to CFAPI. Our `flush_interval: 5s` setting was logged as ignored. Setting flush_mode: interval forces interval-based flushing with the 5s cadence we set. End-to-end latency drops from ~11 min to ~5-10s (fluent-bit flush 1s + fluentd flush 5s + CFAPI POST + index). Also adds flush_thread_count: 2 for parallel chunk POSTs — single- threaded flushing was likely the next bottleneck if any chunk stalled on a slow CFAPI response. Surfaced live: synthetic 2464-byte stdout line emitted from a fresh pod sat in the fluentd file buffer for ~5 min without reaching vcflogs (buffer file present, no flush attempts in fluentd log). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Hotfix #4 for the logging migration. Default fluentd flush_mode is lazy → uses timekey 10m → flush_interval ignored. Sets explicit interval mode so chunks flush every 5s instead of sitting on disk for ~11 min.