pub const CACHE_SIZE_CAP: u64 = _; // 536_870_912u64Expand description
Size cap (bytes) for a single workspace’s cache directory. At
startup, if the directory exceeds this, we reset it — simpler than
LRU eviction and the rebuild cost is bounded (it’s just the next
workspace scan running as if cold). 512 MiB fits a mega-workspace
(50 k files × ~10 KB average StubSlice) with headroom and is
small enough that no reasonable disk will choke on it.