fix: capacities single-sourced in types (display MAX_WINDOWS/BUFFER_PAGES, storage MAX_CLIENTS), display + storage budgets derived from them, const asserts on VA layouts; kernel regions 64 -> 256

crates/servers/storage-server/src/server.rs

@@ -9,8 +9,7 @@ use crate::scope::Scope;
 
 mod session;
 
-/// Connections at once: every program reading files, apps among them.
-const MAX_CLIENTS: usize = 16;
+use types::storage::MAX_CLIENTS;
 /// Handles at or past this are never valid (the file systems hand out
 /// fewer), so ownership fits a small table.
 const MAX_HANDLES: usize = 16;