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/adapter-riscv/src/boot/loader.rs

@@ -38,13 +38,16 @@ pub fn load_init(uart: &Uart) -> LoadedProcess {
 }
 
 /// Storage's budget, carved from init's.
-const STORAGE: Limits = Limits {
-    // A 16-page buffer per client (16), its image and cache.
-    pages: 512,
-    endpoints: 2,
-    notifications: 2,
-    // A buffer per client and the disk's DMA.
-    regions: 20,
+const STORAGE: Limits = {
+    use types::storage::{BUFFER_PAGES, MAX_CLIENTS};
+    Limits {
+        // A buffer per client, and its image, heap and cache.
+        pages: MAX_CLIENTS * BUFFER_PAGES + 256,
+        endpoints: 2,
+        notifications: 2,
+        // A buffer per client, and the disk's DMA.
+        regions: MAX_CLIENTS + 4,
+    }
 };
 
 /// Storage, which init needs to read anything else, its budget carved