[v3] Continuous RSS memory leak ~12MB/hour on 3.9.3 with continuous write

[ngillen]

Version: 3.9.3 (revision e8cd4f7)
Platform: aarch64 Linux, Docker
WAL config: INFLUXDB3_WAL_FLUSH_INTERVAL=10s, INFLUXDB3_NUM_WAL_FILES_TO_KEEP=100
Measured leak: deriv(container_memory_rss[6h]) = ~3300 bytes/sec (~12 MB/hour)
WAL tuning reduced leak by ~20% (from ~4100 to ~3300 bytes/sec)